diff --git a/packages/backend/src/database/schema.ts b/packages/backend/src/database/schema.ts
index b97af0e..d1cc55d 100644
--- a/packages/backend/src/database/schema.ts
+++ b/packages/backend/src/database/schema.ts
@@ -76,6 +76,7 @@ export const createConnectionsTableSQL = `
 CREATE TABLE IF NOT EXISTS connections (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     name TEXT NULL, -- 允许 name 为空
+    type TEXT NOT NULL CHECK(type IN ('SSH', 'RDP')) DEFAULT 'SSH',
     host TEXT NOT NULL,
     port INTEGER NOT NULL,
     username TEXT NOT NULL,
diff --git a/packages/backend/src/repositories/connection.repository.ts b/packages/backend/src/repositories/connection.repository.ts
index 17343af..d10c6b3 100644
--- a/packages/backend/src/repositories/connection.repository.ts
+++ b/packages/backend/src/repositories/connection.repository.ts
@@ -7,6 +7,7 @@ import { getDbInstance, runDb, getDb as getDbRow, allDb } from '../database/conn
 interface ConnectionBase {
     id: number;
     name: string | null;
+    type: 'SSH' | 'RDP'; // Add type field
     host: string;
     port: number;
     username: string;
@@ -17,15 +18,18 @@ interface ConnectionBase {
     last_connected_at: number | null;
 }
 
+// ConnectionWithTagsRow implicitly includes 'type' via ConnectionBase
 interface ConnectionWithTagsRow extends ConnectionBase {
-    tag_ids_str: string | null; 
+    tag_ids_str: string | null;
 }
 
+// ConnectionWithTags implicitly includes 'type' via ConnectionBase
 export interface ConnectionWithTags extends ConnectionBase {
     tag_ids: number[];
 }
 
 // 包含加密字段的完整类型，用于插入/更新
+// FullConnectionData implicitly includes 'type' via ConnectionBase
 export interface FullConnectionData extends ConnectionBase {
     encrypted_password?: string | null;
     encrypted_private_key?: string | null;
@@ -34,6 +38,7 @@ export interface FullConnectionData extends ConnectionBase {
 }
 
 
+// FullConnectionDbRow implicitly includes 'type' via FullConnectionData
 interface FullConnectionDbRow extends FullConnectionData {
     proxy_db_id: number | null;
     proxy_name: string | null;
@@ -53,7 +58,7 @@ interface FullConnectionDbRow extends FullConnectionData {
 export const findAllConnectionsWithTags = async (): Promise<ConnectionWithTags[]> => {
     const sql = `
         SELECT
-            c.id, c.name, c.host, c.port, c.username, c.auth_method, c.proxy_id,
+            c.id, c.name, c.type, c.host, c.port, c.username, c.auth_method, c.proxy_id,
             c.created_at, c.updated_at, c.last_connected_at,
             GROUP_CONCAT(ct.tag_id) as tag_ids_str
          FROM connections c
@@ -79,7 +84,7 @@ export const findAllConnectionsWithTags = async (): Promise<ConnectionWithTags[]
 export const findConnectionByIdWithTags = async (id: number): Promise<ConnectionWithTags | null> => {
     const sql = `
         SELECT
-            c.id, c.name, c.host, c.port, c.username, c.auth_method, c.proxy_id,
+            c.id, c.name, c.type, c.host, c.port, c.username, c.auth_method, c.proxy_id,
             c.created_at, c.updated_at, c.last_connected_at,
             GROUP_CONCAT(ct.tag_id) as tag_ids_str
          FROM connections c
@@ -132,13 +137,15 @@ export const findFullConnectionById = async (id: number): Promise<FullConnection
 /**
  * 创建新连接 (不处理标签)
  */
+// Update input type to reflect FullConnectionData now has 'type'
 export const createConnection = async (data: Omit<FullConnectionData, 'id' | 'created_at' | 'updated_at' | 'last_connected_at' | 'tag_ids'>): Promise<number> => {
     const now = Math.floor(Date.now() / 1000);
     const sql = `
-        INSERT INTO connections (name, host, port, username, auth_method, encrypted_password, encrypted_private_key, encrypted_passphrase, proxy_id, created_at, updated_at)
-          VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
+        INSERT INTO connections (name, type, host, port, username, auth_method, encrypted_password, encrypted_private_key, encrypted_passphrase, proxy_id, created_at, updated_at)
+          VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`; // Add type column and placeholder
     const params = [
         data.name ?? null,
+        data.type, // Add type parameter
         data.host, data.port, data.username, data.auth_method,
         data.encrypted_password ?? null, data.encrypted_private_key ?? null, data.encrypted_passphrase ?? null,
         data.proxy_id ?? null,
@@ -160,6 +167,7 @@ export const createConnection = async (data: Omit<FullConnectionData, 'id' | 'cr
 /**
  * 更新连接信息 (不处理标签)
  */
+// Update input type to reflect FullConnectionData now has 'type'
 export const updateConnection = async (id: number, data: Partial<Omit<FullConnectionData, 'id' | 'created_at' | 'last_connected_at' | 'tag_ids'>>): Promise<boolean> => {
     const fieldsToUpdate: { [key: string]: any } = { ...data };
     const params: any[] = [];
@@ -270,17 +278,18 @@ export const updateConnectionTags = async (connectionId: number, tagIds: number[
  */
 export const bulkInsertConnections = async (
     db: Database,
+    // Update input type to reflect FullConnectionData now has 'type'
     connections: Array<Omit<FullConnectionData, 'id' | 'created_at' | 'updated_at' | 'last_connected_at'> & { tag_ids?: number[] }>
 ): Promise<{ connectionId: number, originalData: any }[]> => {
 
-    const insertConnSql = `INSERT INTO connections (name, host, port, username, auth_method, encrypted_password, encrypted_private_key, encrypted_passphrase, proxy_id, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
+    const insertConnSql = `INSERT INTO connections (name, type, host, port, username, auth_method, encrypted_password, encrypted_private_key, encrypted_passphrase, proxy_id, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`; // Add type column and placeholder
     const results: { connectionId: number, originalData: any }[] = [];
     const now = Math.floor(Date.now() / 1000);
 
 
     for (const connData of connections) {
         const params = [
-            connData.name ?? null, connData.host, connData.port, connData.username, connData.auth_method,
+            connData.name ?? null, connData.type, connData.host, connData.port, connData.username, connData.auth_method, // Add type parameter
             connData.encrypted_password || null,
             connData.encrypted_private_key || null,
             connData.encrypted_passphrase || null,
diff --git a/packages/backend/src/services/connection.service.ts b/packages/backend/src/services/connection.service.ts
index 802d1db..3234a7a 100644
--- a/packages/backend/src/services/connection.service.ts
+++ b/packages/backend/src/services/connection.service.ts
@@ -18,57 +18,93 @@ const auditLogService = new AuditLogService(); // 实例化 AuditLogService
  * 获取所有连接（包含标签）
  */
 export const getAllConnections = async (): Promise<ConnectionWithTags[]> => {
-    return ConnectionRepository.findAllConnectionsWithTags();
+    // Repository now returns ConnectionWithTags including 'type'
+    // Explicit type assertion to ensure compatibility
+    return ConnectionRepository.findAllConnectionsWithTags() as Promise<ConnectionWithTags[]>;
 };
 
 /**
  * 根据 ID 获取单个连接（包含标签）
  */
 export const getConnectionById = async (id: number): Promise<ConnectionWithTags | null> => {
-    return ConnectionRepository.findConnectionByIdWithTags(id);
+    // Repository now returns ConnectionWithTags including 'type'
+    // Explicit type assertion to ensure compatibility
+    return ConnectionRepository.findConnectionByIdWithTags(id) as Promise<ConnectionWithTags | null>;
 };
 
 /**
  * 创建新连接
  */
 export const createConnection = async (input: CreateConnectionInput): Promise<ConnectionWithTags> => {
-    // 1. 验证输入
-    if (!input.host || !input.username || !input.auth_method) {
-        throw new Error('缺少必要的连接信息 (host, username, auth_method)。');
+    console.log('[Service:createConnection] Received input:', JSON.stringify(input, null, 2)); // Log input
+    // 1. 验证输入 (包含 type)
+    // Convert type to uppercase for validation and consistency
+    const connectionType = input.type?.toUpperCase() as 'SSH' | 'RDP' | undefined; // Ensure type safety
+    if (!connectionType || !['SSH', 'RDP'].includes(connectionType)) {
+        throw new Error('必须提供有效的连接类型 (SSH 或 RDP)。');
     }
-    if (input.auth_method === 'password' && !input.password) {
-        throw new Error('密码认证方式需要提供 password。');
+    if (!input.host || !input.username) {
+        throw new Error('缺少必要的连接信息 (host, username)。');
     }
-    if (input.auth_method === 'key' && !input.private_key) {
-        throw new Error('密钥认证方式需要提供 private_key。');
+    // Type-specific validation using the uppercase version
+    if (connectionType === 'SSH') {
+        if (!input.auth_method || !['password', 'key'].includes(input.auth_method)) {
+             throw new Error('SSH 连接必须提供有效的认证方式 (password 或 key)。');
+        }
+        if (input.auth_method === 'password' && !input.password) {
+            throw new Error('SSH 密码认证方式需要提供 password。');
+        }
+        if (input.auth_method === 'key' && !input.private_key) {
+            throw new Error('SSH 密钥认证方式需要提供 private_key。');
+        }
+    } else if (connectionType === 'RDP') {
+        if (!input.password) {
+             throw new Error('RDP 连接需要提供 password。');
+        }
+        // For RDP, we'll ignore auth_method, private_key, passphrase from input if provided
     }
 
-    // 2. 加密凭证
+    // 2. 加密凭证 (根据 type)
     let encryptedPassword = null;
     let encryptedPrivateKey = null;
     let encryptedPassphrase = null;
+    // Default to 'password' for DB compatibility, especially for RDP
+    let authMethodForDb: 'password' | 'key' = 'password';
 
-    if (input.auth_method === 'password') {
-        encryptedPassword = encrypt(input.password!);
-    } else if (input.auth_method === 'key') {
-        encryptedPrivateKey = encrypt(input.private_key!);
-        if (input.passphrase) {
-            encryptedPassphrase = encrypt(input.passphrase);
+    if (connectionType === 'SSH') {
+        authMethodForDb = input.auth_method!; // Already validated above
+        if (input.auth_method === 'password') {
+            encryptedPassword = encrypt(input.password!);
+        } else { // key
+            encryptedPrivateKey = encrypt(input.private_key!);
+            if (input.passphrase) {
+                encryptedPassphrase = encrypt(input.passphrase);
+            }
         }
+    } else { // RDP (connectionType is 'RDP')
+        encryptedPassword = encrypt(input.password!);
+        // authMethodForDb remains 'password' for RDP to satisfy DB constraint
+        // Ensure SSH specific fields are null for RDP
+        encryptedPrivateKey = null;
+        encryptedPassphrase = null;
     }
 
     // 3. 准备仓库数据
-    const connectionData = {
-        name: input.name || '', // 如果 name 为空或 undefined，则使用空字符串 ''
+    const defaultPort = input.type === 'RDP' ? 3389 : 22;
+    // Explicitly type the object being passed to the repository
+    const connectionData: Omit<ConnectionRepository.FullConnectionData, 'id' | 'created_at' | 'updated_at' | 'last_connected_at' | 'tag_ids'> = {
+        name: input.name || '',
+        type: connectionType, // Use the validated uppercase type
         host: input.host,
-        port: input.port ?? 22, // 默认端口
+        port: input.port ?? defaultPort, // Use type-specific default port
         username: input.username,
-        auth_method: input.auth_method,
+        auth_method: authMethodForDb, // Use determined auth method
         encrypted_password: encryptedPassword,
-        encrypted_private_key: encryptedPrivateKey,
-        encrypted_passphrase: encryptedPassphrase,
+        encrypted_private_key: encryptedPrivateKey, // Will be null for RDP
+        encrypted_passphrase: encryptedPassphrase, // Will be null for RDP
         proxy_id: input.proxy_id ?? null,
     };
+    console.log('[Service:createConnection] Data to be saved:', JSON.stringify(connectionData, null, 2)); // Log data before saving
 
     // 4. 在仓库中创建连接记录
     const newConnectionId = await ConnectionRepository.createConnection(connectionData);
@@ -86,7 +122,7 @@ export const createConnection = async (input: CreateConnectionInput): Promise<Co
         console.error(`[Audit Log Error] Failed to retrieve connection ${newConnectionId} after creation.`);
         throw new Error('创建连接后无法检索到该连接。');
     }
-    auditLogService.logAction('CONNECTION_CREATED', { connectionId: newConnection.id, name: newConnection.name, host: newConnection.host });
+    auditLogService.logAction('CONNECTION_CREATED', { connectionId: newConnection.id, type: newConnection.type, name: newConnection.name, host: newConnection.host }); // Add type to audit log
 
     // 7. 返回新创建的带标签的连接
     return newConnection;
@@ -103,57 +139,85 @@ export const updateConnection = async (id: number, input: UpdateConnectionInput)
     }
 
     // 2. 准备更新数据
-    const dataToUpdate: Partial<ConnectionRepository.FullConnectionData> = {};
+    // Explicitly type dataToUpdate to match the repository's expected input
+    const dataToUpdate: Partial<Omit<ConnectionRepository.FullConnectionData, 'id' | 'created_at' | 'last_connected_at' | 'tag_ids'>> = {};
     let needsCredentialUpdate = false;
-    let newAuthMethod = input.auth_method || currentFullConnection.auth_method;
+    // Determine the final type, converting input type to uppercase if provided
+    const targetType = input.type?.toUpperCase() as 'SSH' | 'RDP' | undefined || currentFullConnection.type;
 
     // 更新非凭证字段
-    if (input.name !== undefined) dataToUpdate.name = input.name || ''; // 如果 name 是空字符串或 null/undefined，则使用空字符串 ''
+    if (input.name !== undefined) dataToUpdate.name = input.name || '';
+    // Update type if changed, using the uppercase version
+    if (input.type !== undefined && targetType !== currentFullConnection.type) dataToUpdate.type = targetType;
     if (input.host !== undefined) dataToUpdate.host = input.host;
     if (input.port !== undefined) dataToUpdate.port = input.port;
     if (input.username !== undefined) dataToUpdate.username = input.username;
-    if (input.proxy_id !== undefined) dataToUpdate.proxy_id = input.proxy_id; // 允许设置为 null
+    if (input.proxy_id !== undefined) dataToUpdate.proxy_id = input.proxy_id;
 
-    // 处理认证方法更改或凭证更新
-    if (input.auth_method && input.auth_method !== currentFullConnection.auth_method) {
-        // 认证方法已更改
-        dataToUpdate.auth_method = input.auth_method;
-        needsCredentialUpdate = true;
-        if (input.auth_method === 'password') {
-            if (!input.password) throw new Error('切换到密码认证时需要提供 password。');
-            dataToUpdate.encrypted_password = encrypt(input.password);
+    // 处理认证方法更改或凭证更新 (根据 targetType)
+    // Use the validated targetType for logic
+    if (targetType === 'SSH') {
+        const currentAuthMethod = currentFullConnection.auth_method;
+        const inputAuthMethod = input.auth_method;
+
+        // Determine the final auth method for SSH
+        const finalAuthMethod = inputAuthMethod || currentAuthMethod;
+        if (finalAuthMethod !== currentAuthMethod) {
+             dataToUpdate.auth_method = finalAuthMethod; // Update auth_method if it changed
+        }
+
+        if (finalAuthMethod === 'password') {
+            // If switching to password or updating password
+            if (input.password !== undefined) { // Check if password was provided in input
+                 if (!input.password && finalAuthMethod !== currentAuthMethod) {
+                     // Switching to password requires a password
+                     throw new Error('切换到密码认证时需要提供 password。');
+                 }
+                 // Encrypt if password is not empty, otherwise set to null (to clear)
+                 dataToUpdate.encrypted_password = input.password ? encrypt(input.password) : null;
+                 needsCredentialUpdate = true;
+            }
+            // When switching to password, clear key fields
+            if (finalAuthMethod !== currentAuthMethod) {
+                dataToUpdate.encrypted_private_key = null;
+                dataToUpdate.encrypted_passphrase = null;
+            }
+        } else { // finalAuthMethod is 'key'
+            let keyUpdated = false;
+            // If switching to key or updating key
+            if (input.private_key !== undefined) {
+                 if (!input.private_key && finalAuthMethod !== currentAuthMethod) {
+                     // Switching to key requires a private key
+                     throw new Error('切换到密钥认证时需要提供 private_key。');
+                 }
+                 // Encrypt if key is not empty, otherwise set to null (to clear)
+                 dataToUpdate.encrypted_private_key = input.private_key ? encrypt(input.private_key) : null;
+                 needsCredentialUpdate = true;
+                 keyUpdated = true;
+            }
+            // Update passphrase only if key was updated OR passphrase itself was provided
+            if (keyUpdated || input.passphrase !== undefined) {
+                 // Encrypt if passphrase is not empty, otherwise set to null (to clear)
+                 dataToUpdate.encrypted_passphrase = input.passphrase ? encrypt(input.passphrase) : null;
+                 needsCredentialUpdate = true; // Consider passphrase change a credential update
+            }
+             // When switching to key, clear password field
+            if (finalAuthMethod !== currentAuthMethod) {
+                dataToUpdate.encrypted_password = null;
+            }
+        }
+    } else { // targetType is 'RDP'
+        // RDP only uses password
+        if (input.password !== undefined) { // Check if password was provided
+             // Encrypt if password is not empty, otherwise set to null (to clear)
+             dataToUpdate.encrypted_password = input.password ? encrypt(input.password) : null;
+             needsCredentialUpdate = true;
+        }
+        // Ensure SSH specific fields are nullified if switching to RDP or updating RDP
+        if (targetType !== currentFullConnection.type || needsCredentialUpdate) {
+            dataToUpdate.auth_method = 'password'; // RDP uses password auth method in DB
             dataToUpdate.encrypted_private_key = null;
             dataToUpdate.encrypted_passphrase = null;
-        } else { // 密钥
-            if (!input.private_key) throw new Error('切换到密钥认证时需要提供 private_key。');
-            dataToUpdate.encrypted_private_key = encrypt(input.private_key);
-            // 仅当密码短语为非空字符串时才加密
-            dataToUpdate.encrypted_passphrase = (input.passphrase && input.passphrase.trim() !== '') ? encrypt(input.passphrase) : null;
-            dataToUpdate.encrypted_password = null;
-        }
-    } else {
-        // 认证方法未更改，检查是否提供了当前方法的凭证
-        // 仅当提供了非空字符串时才加密和更新
-        if (newAuthMethod === 'password' && input.password && input.password.trim() !== '') {
-            dataToUpdate.encrypted_password = encrypt(input.password);
-            needsCredentialUpdate = true;
-        } else if (newAuthMethod === 'key') {
-            let passphraseChanged = false;
-            if (input.private_key && input.private_key.trim() !== '') {
-                dataToUpdate.encrypted_private_key = encrypt(input.private_key);
-                // 如果私钥更新，则必须更新（或清除）密码短语
-                // 仅当非空时加密，否则设置为 null
-                dataToUpdate.encrypted_passphrase = (input.passphrase && input.passphrase.trim() !== '') ? encrypt(input.passphrase) : null;
-                needsCredentialUpdate = true;
-                passphraseChanged = true; // 如果密钥更改，则将密码短语标记为已处理
-            }
-            // 处理仅更改密码短语（且密钥未更改）的情况
-            // 检查 input.passphrase 是否已定义（可能是空字符串以清除）
-            if (!passphraseChanged && input.passphrase !== undefined) {
-                 // 仅当非空时加密，否则设置为 null
-                dataToUpdate.encrypted_passphrase = (input.passphrase && input.passphrase.trim() !== '') ? encrypt(input.passphrase) : null;
-                needsCredentialUpdate = true; // 将此视为凭证更新
-            }
         }
     }
 
@@ -182,7 +246,12 @@ export const updateConnection = async (id: number, input: UpdateConnectionInput)
 
     // 5. 如果进行了任何更改，则记录审计操作
     if (hasNonTagChanges || input.tag_ids !== undefined) {
-         auditLogService.logAction('CONNECTION_UPDATED', { connectionId: id, updatedFields: updatedFieldsForAudit });
+         // Add type to audit log if it was updated
+         const auditDetails: any = { connectionId: id, updatedFields: updatedFieldsForAudit };
+         if (dataToUpdate.type) {
+             auditDetails.newType = dataToUpdate.type;
+         }
+         auditLogService.logAction('CONNECTION_UPDATED', auditDetails);
     }
 
     // 6. 获取并返回更新后的连接
diff --git a/packages/backend/src/services/import-export.service.ts b/packages/backend/src/services/import-export.service.ts
index 15f174d..55ad270 100644
--- a/packages/backend/src/services/import-export.service.ts
+++ b/packages/backend/src/services/import-export.service.ts
@@ -7,6 +7,7 @@ import { getDbInstance, runDb, getDb as getDbRow, allDb } from '../database/conn
 
 interface ImportedConnectionData {
     name: string;
+    type: 'SSH' | 'RDP'; // Add type field
     host: string;
     port: number;
     username: string;
@@ -42,10 +43,11 @@ export const exportConnections = async (): Promise<ExportedConnectionData[]> =>
     try {
         const db = await getDbInstance();
 
+        // Ensure ExportRow reflects the updated FullConnectionData (which now includes 'type')
         type ExportRow = ConnectionRepository.FullConnectionData & {
              proxy_db_id: number | null;
              proxy_name: string | null;
-             proxy_type: 'SOCKS5' | 'HTTP' | null;
+             proxy_type: 'SOCKS5' | 'HTTP' | null; // Proxy type remains the same
              proxy_host: string | null;
              proxy_port: number | null;
              proxy_username: string | null;
@@ -85,7 +87,8 @@ export const exportConnections = async (): Promise<ExportedConnectionData[]> =>
 
         const formattedData: ExportedConnectionData[] = connectionsWithProxies.map(row => {
             const connection: ExportedConnectionData = {
-                name: row.name ?? 'Unnamed', 
+                name: row.name ?? 'Unnamed',
+                type: row.type, // Add type field
                 host: row.host,
                 port: row.port,
                 username: row.username,
@@ -154,9 +157,18 @@ export const importConnections = async (fileBuffer: Buffer): Promise<ImportResul
         for (const connData of importedData) {
              try {
 
-                if (!connData.name || !connData.host || !connData.port || !connData.username || !connData.auth_method) {
-                    throw new Error('缺少必要的连接字段 (name, host, port, username, auth_method)。');
+                // Validate imported data, including type
+                if (!connData.type || !['SSH', 'RDP'].includes(connData.type)) {
+                    throw new Error('缺少或无效的连接类型 (type)。');
                 }
+                if (!connData.name || !connData.host || !connData.port || !connData.username) {
+                    throw new Error('缺少必要的连接字段 (name, host, port, username)。');
+                }
+                // Validate SSH specific fields only if type is SSH
+                if (connData.type === 'SSH' && (!connData.auth_method || !['password', 'key'].includes(connData.auth_method))) {
+                     throw new Error('SSH 连接缺少有效的认证方式 (auth_method)。');
+                }
+                // RDP specific validation (e.g., password required) could be added here if needed
 
 
                 let proxyIdToUse: number | null = null;
@@ -192,12 +204,15 @@ export const importConnections = async (fileBuffer: Buffer): Promise<ImportResul
                     }
                 }
 
+                // Prepare data for repository, ensuring correct auth_method for RDP
+                const authMethodForDb = connData.type === 'RDP' ? 'password' : connData.auth_method!;
                 connectionsToInsert.push({
                     name: connData.name,
+                    type: connData.type, // Add type
                     host: connData.host,
                     port: connData.port,
                     username: connData.username,
-                    auth_method: connData.auth_method,
+                    auth_method: authMethodForDb, // Use determined auth method
                     encrypted_password: connData.encrypted_password || null,
                     encrypted_private_key: connData.encrypted_private_key || null,
                     encrypted_passphrase: connData.encrypted_passphrase || null,
diff --git a/packages/backend/src/types/connection.types.ts b/packages/backend/src/types/connection.types.ts
index 8e2b277..0f49d79 100644
--- a/packages/backend/src/types/connection.types.ts
+++ b/packages/backend/src/types/connection.types.ts
@@ -3,6 +3,7 @@
 export interface ConnectionBase {
     id: number;
     name: string | null;
+    type: 'SSH' | 'RDP';
     host: string;
     port: number;
     username: string;
@@ -19,7 +20,8 @@ export interface ConnectionWithTags extends ConnectionBase {
 
 
 export interface CreateConnectionInput {
-    name?: string; 
+    name?: string;
+    type: 'SSH' | 'RDP';
     host: string;
     port?: number;
     username: string;
@@ -34,6 +36,7 @@ export interface CreateConnectionInput {
 
 export interface UpdateConnectionInput {
     name?: string;
+    type?: 'SSH' | 'RDP';
     host?: string;
     port?: number;
     username?: string;
@@ -49,6 +52,7 @@ export interface UpdateConnectionInput {
 export interface FullConnectionData {
     id: number;
     name: string | null;
+    type: 'SSH' | 'RDP';
     host: string;
     port: number;
     username: string;
diff --git a/packages/frontend/src/components/AddConnectionForm.vue b/packages/frontend/src/components/AddConnectionForm.vue
index ea70980..c7c2442 100644
--- a/packages/frontend/src/components/AddConnectionForm.vue
+++ b/packages/frontend/src/components/AddConnectionForm.vue
@@ -26,16 +26,18 @@ const { tags, isLoading: isTagLoading, error: tagStoreError } = storeToRefs(tags
 
 // 表单数据模型
 const initialFormData = {
+  type: 'SSH' as 'SSH' | 'RDP', // Use uppercase to match ConnectionInfo
   name: '',
   host: '',
   port: 22,
   username: '',
-  auth_method: 'password' as 'password' | 'key',
+  auth_method: 'password' as 'password' | 'key', // SSH specific
   password: '',
-  private_key: '',
-  passphrase: '',
+  private_key: '', // SSH specific
+  passphrase: '', // SSH specific
   proxy_id: null as number | null,
   tag_ids: [] as number[], // 新增 tag_ids 字段
+  // Add RDP specific fields later if needed, e.g., domain
 };
 const formData = reactive({ ...initialFormData });
 
@@ -71,6 +73,7 @@ watch(() => props.connectionToEdit, (newVal) => {
     formError.value = null; // 清除错误
     if (newVal) {
         // 编辑模式：填充表单，但不填充敏感信息
+        formData.type = newVal.type; // Correctly set the type for editing
         formData.name = newVal.name;
         formData.host = newVal.host;
         formData.port = newVal.port;
@@ -94,6 +97,21 @@ onMounted(() => {
     tagsStore.fetchTags(); // 获取标签列表
 });
 
+// 监听连接类型变化，动态调整默认端口
+watch(() => formData.type, (newType) => {
+    // Use uppercase for comparison
+    if (newType === 'RDP' && formData.port === 22) {
+        formData.port = 3389; // RDP 默认端口
+    } else if (newType === 'SSH' && formData.port === 3389) {
+        formData.port = 22; // SSH 默认端口
+    }
+    // 重置或调整认证方式等逻辑可以在这里添加
+    if (newType === 'RDP') {
+        // RDP 通常只用密码，可以强制或隐藏 auth_method
+        // formData.auth_method = 'password'; // Example: Force password for RDP
+    }
+});
+
 // 处理表单提交
 const handleSubmit = async () => {
   formError.value = null;
@@ -110,71 +128,108 @@ const handleSubmit = async () => {
       return;
   }
 
-  // --- 更新后的验证逻辑 ---
-  // 1. 添加模式下，密码/密钥是必填的
-  if (!isEditMode.value) {
-      if (formData.auth_method === 'password' && !formData.password) {
-          formError.value = t('connections.form.errorPasswordRequired');
+  // --- 更新后的验证逻辑 (区分 SSH 和 RDP) ---
+  // Use uppercase for comparison
+  if (formData.type === 'SSH') {
+      // SSH Validation
+      // 1. 添加模式下，密码/密钥是必填的
+      if (!isEditMode.value) {
+          if (formData.auth_method === 'password' && !formData.password) {
+              formError.value = t('connections.form.errorPasswordRequired');
+              return;
+          }
+          if (formData.auth_method === 'key' && !formData.private_key) {
+              formError.value = t('connections.form.errorPrivateKeyRequired');
+              return;
+          }
+      }
+      // 2. 编辑模式下，如果切换到密码认证，则密码必填
+      else if (isEditMode.value && formData.auth_method === 'password' && !formData.password) {
+          // 检查原始连接的认证方式，如果原始不是密码，则切换时必须提供密码
+          // 注意: props.connectionToEdit 可能没有 type 字段，需要后端配合或前端自行判断
+          if (props.connectionToEdit?.auth_method !== 'password') {
+              formError.value = t('connections.form.errorPasswordRequiredOnSwitch');
+              return;
+          }
+          // 如果原始就是密码，编辑时密码可以不填（表示不修改）
+      }
+      // 3. 编辑模式下，如果切换到密钥认证，则私钥必填
+      else if (isEditMode.value && formData.auth_method === 'key' && !formData.private_key) {
+           // 检查原始连接的认证方式，如果原始不是密钥，则切换时必须提供私钥
+           if (props.connectionToEdit?.auth_method !== 'key') {
+               formError.value = t('connections.form.errorPrivateKeyRequiredOnSwitch');
+               return;
+           }
+           // 如果原始就是密钥，编辑时私钥可以不填（表示不修改）
+      }
+  // Use uppercase for comparison
+  } else if (formData.type === 'RDP') {
+      // RDP Validation
+      // 1. 添加模式下，密码是必填的
+      if (!isEditMode.value && !formData.password) {
+          formError.value = t('connections.form.errorPasswordRequired'); // 可以复用密码必填的翻译
           return;
       }
-      if (formData.auth_method === 'key' && !formData.private_key) {
-          formError.value = t('connections.form.errorPrivateKeyRequired');
-          return;
-      }
-  }
-  // 2. 编辑模式下，如果切换到密码认证，则密码必填
-  else if (isEditMode.value && formData.auth_method === 'password' && !formData.password) {
-      // 检查原始连接的认证方式，如果原始不是密码，则切换时必须提供密码
-      if (props.connectionToEdit?.auth_method !== 'password') {
-          formError.value = t('connections.form.errorPasswordRequiredOnSwitch'); // 新增翻译键
-          return;
-      }
-      // 如果原始就是密码，编辑时密码可以不填（表示不修改）
-  }
-  // 3. 编辑模式下，如果切换到密钥认证，则私钥必填
-  else if (isEditMode.value && formData.auth_method === 'key' && !formData.private_key) {
-       // 检查原始连接的认证方式，如果原始不是密钥，则切换时必须提供私钥
-       if (props.connectionToEdit?.auth_method !== 'key') {
-           formError.value = t('connections.form.errorPrivateKeyRequiredOnSwitch'); // 新增翻译键
-           return;
-       }
-       // 如果原始就是密钥，编辑时私钥可以不填（表示不修改）
+      // 2. 编辑模式下，密码可以不填（表示不修改），除非是从非 RDP 类型切换过来（这个逻辑比较复杂，暂时简化为密码非必填）
+      //    如果需要更严格的验证（例如从 SSH 编辑为 RDP 时强制要求输入密码），可以在这里添加
   }
   // --- 验证逻辑结束 ---
 
 
   // 构建要发送的数据 (区分添加和编辑)
   const dataToSend: any = {
+      type: formData.type, // 发送连接类型
       name: formData.name,
       host: formData.host,
       port: formData.port,
       username: formData.username,
-      auth_method: formData.auth_method,
       proxy_id: formData.proxy_id || null,
       tag_ids: formData.tag_ids || [], // 发送 tag_ids
+      // domain: formData.domain, // 如果添加了 domain 字段
   };
 
-  // 处理敏感字段
-  if (formData.auth_method === 'password') {
-      // 仅当用户输入新密码或在编辑模式下明确清空时才发送
+  // 处理认证相关字段 (根据类型)
+  // Use uppercase for comparison
+  if (formData.type === 'SSH') {
+      dataToSend.auth_method = formData.auth_method;
+      if (formData.auth_method === 'password') {
+          // SSH 密码处理
+          if (formData.password) {
+              dataToSend.password = formData.password;
+          } else if (isEditMode.value && formData.password === '') {
+              // 编辑模式下，空密码字符串可能表示清空或不修改，取决于后端实现
+              // 假设发送 null 表示清空 (如果后端支持)
+              // dataToSend.password = null;
+              // 或者不发送 password 字段表示不修改
+          }
+      } else if (formData.auth_method === 'key') {
+          // SSH 密钥处理
+          if (formData.private_key) {
+              dataToSend.private_key = formData.private_key;
+          }
+          // SSH 密码短语处理
+          if (formData.passphrase) {
+              dataToSend.passphrase = formData.passphrase;
+          } else if (isEditMode.value && formData.passphrase === '') {
+              // dataToSend.passphrase = null; // 发送 null 表示清空
+          }
+      }
+  // Use uppercase for comparison
+  } else if (formData.type === 'RDP') {
+      // RDP 密码处理 (通常 RDP 没有 auth_method 选择)
       if (formData.password) {
           dataToSend.password = formData.password;
       } else if (isEditMode.value && formData.password === '') {
-          dataToSend.password = null; // 发送 null 表示清空密码 (后端需要能处理 null)
-      }
-  } else if (formData.auth_method === 'key') {
-      // 仅当用户输入新私钥时才发送
-      if (formData.private_key) {
-          dataToSend.private_key = formData.private_key;
-      }
-      // 仅当用户输入新密码短语或在编辑模式下明确清空时才发送
-      if (formData.passphrase) {
-          dataToSend.passphrase = formData.passphrase;
-      } else if (isEditMode.value && formData.passphrase === '') {
-          dataToSend.passphrase = null; // 发送 null 表示清空密码短语
+          // 编辑 RDP 时，空密码字符串处理逻辑同上
+          // dataToSend.password = null;
       }
+      // RDP 不发送 SSH 特有的字段
+      delete dataToSend.auth_method;
+      delete dataToSend.private_key;
+      delete dataToSend.passphrase;
   }
 
+
   let success = false;
   if (isEditMode.value && props.connectionToEdit) {
       // 调用更新 action
@@ -300,6 +355,16 @@ const testButtonText = computed(() => {
             <input type="text" id="conn-name" v-model="formData.name"
                    class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
           </div>
+          <!-- Connection Type -->
+          <div>
+            <label for="conn-type" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.connectionType', '连接类型') }}</label>
+            <select id="conn-type" v-model="formData.type"
+                    class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary appearance-none bg-no-repeat bg-right pr-8"
+                    style="background-image: url('data:image/svg+xml,%3csvg xmlns=\'http://www.w3.org/2000/svg\' viewBox=\'0 0 16 16\'%3e%3cpath fill=\'none\' stroke=\'%236c757d\' stroke-linecap=\'round\' stroke-linejoin=\'round\' stroke-width=\'2\' d=\'M2 5l6 6 6-6\'/%3e%3c/svg%3e'); background-position: right 0.75rem center; background-size: 16px 12px;">
+              <option value="SSH">{{ t('connections.form.typeSsh', 'SSH') }}</option>
+              <option value="RDP">{{ t('connections.form.typeRdp', 'RDP') }}</option>
+            </select>
+          </div>
           <!-- Host and Port Row -->
           <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
             <div class="md:col-span-2">
@@ -317,44 +382,65 @@ const testButtonText = computed(() => {
 
         <!-- Authentication Section -->
         <div class="space-y-4 p-4 border border-border rounded-md bg-header/30">
-           <h4 class="text-base font-semibold mb-3 pb-2 border-b border-border/50">{{ t('connections.form.sectionAuth', '认证方式') }}</h4>
+           <h4 class="text-base font-semibold mb-3 pb-2 border-b border-border/50">{{ t('connections.form.sectionAuth', '认证信息') }}</h4>
            <div>
              <label for="conn-username" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.username') }}</label>
              <input type="text" id="conn-username" v-model="formData.username" required
                     class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
-           </div>
-           <div>
-             <label for="conn-auth-method" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.authMethod') }}</label>
-             <select id="conn-auth-method" v-model="formData.auth_method"
-                     class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary appearance-none bg-no-repeat bg-right pr-8"
-                     style="background-image: url('data:image/svg+xml,%3csvg xmlns=\'http://www.w3.org/2000/svg\' viewBox=\'0 0 16 16\'%3e%3cpath fill=\'none\' stroke=\'%236c757d\' stroke-linecap=\'round\' stroke-linejoin=\'round\' stroke-width=\'2\' d=\'M2 5l6 6 6-6\'/%3e%3c/svg%3e'); background-position: right 0.75rem center; background-size: 16px 12px;">
-               <option value="password">{{ t('connections.form.authMethodPassword') }}</option>
-               <option value="key">{{ t('connections.form.authMethodKey') }}</option>
-             </select>
-           </div>
+          </div>
 
-           <div v-if="formData.auth_method === 'password'">
-             <label for="conn-password" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.password') }}</label>
-             <input type="password" id="conn-password" v-model="formData.password" :required="formData.auth_method === 'password' && !isEditMode" autocomplete="new-password"
-                    class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
-           </div>
+          <!-- SSH Specific Auth -->
+          <!-- Use uppercase for comparison -->
+          <template v-if="formData.type === 'SSH'">
+            <div>
+              <label for="conn-auth-method" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.authMethod') }}</label>
+              <select id="conn-auth-method" v-model="formData.auth_method"
+                      class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary appearance-none bg-no-repeat bg-right pr-8"
+                      style="background-image: url('data:image/svg+xml,%3csvg xmlns=\'http://www.w3.org/2000/svg\' viewBox=\'0 0 16 16\'%3e%3cpath fill=\'none\' stroke=\'%236c757d\' stroke-linecap=\'round\' stroke-linejoin=\'round\' stroke-width=\'2\' d=\'M2 5l6 6 6-6\'/%3e%3c/svg%3e'); background-position: right 0.75rem center; background-size: 16px 12px;">
+                <option value="password">{{ t('connections.form.authMethodPassword') }}</option>
+                <option value="key">{{ t('connections.form.authMethodKey') }}</option>
+              </select>
+            </div>
 
-           <div v-if="formData.auth_method === 'key'" class="space-y-4">
+            <div v-if="formData.auth_method === 'password'">
+              <label for="conn-password" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.password') }}</label>
+              <input type="password" id="conn-password" v-model="formData.password" :required="formData.auth_method === 'password' && !isEditMode" autocomplete="new-password"
+                     class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
+            </div>
+
+            <div v-if="formData.auth_method === 'key'" class="space-y-4">
+              <div>
+                <label for="conn-private-key" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.privateKey') }}</label>
+                <textarea id="conn-private-key" v-model="formData.private_key" rows="4" :required="formData.auth_method === 'key' && !isEditMode"
+                          class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary font-mono text-sm"></textarea>
+              </div>
+              <div>
+                <label for="conn-passphrase" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.passphrase') }} ({{ t('connections.form.optional') }})</label>
+                <input type="password" id="conn-passphrase" v-model="formData.passphrase" autocomplete="new-password"
+                       class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
+              </div>
+              <div v-if="isEditMode && formData.auth_method === 'key'">
+                <small class="block text-xs text-text-secondary">{{ t('connections.form.keyUpdateNote') }}</small>
+              </div>
+            </div>
+          </template>
+
+          <!-- RDP Specific Auth (Password only for now) -->
+          <!-- Use uppercase for comparison -->
+          <template v-if="formData.type === 'RDP'">
              <div>
-               <label for="conn-private-key" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.privateKey') }}</label>
-               <textarea id="conn-private-key" v-model="formData.private_key" rows="4" :required="formData.auth_method === 'key' && !isEditMode"
-                         class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary font-mono text-sm"></textarea>
-             </div>
-             <div>
-               <label for="conn-passphrase" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.passphrase') }} ({{ t('connections.form.optional') }})</label>
-               <input type="password" id="conn-passphrase" v-model="formData.passphrase" autocomplete="new-password"
+               <label for="conn-password-rdp" class="block text-sm font-medium text-text-secondary mb-1">{{ t('connections.form.password') }}</label>
+               <input type="password" id="conn-password-rdp" v-model="formData.password" :required="!isEditMode" autocomplete="new-password"
                       class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
+               <!-- Add domain field if needed -->
+               <!--
+               <label for="conn-domain" class="block text-sm font-medium text-text-secondary mb-1 mt-4">{{ t('connections.form.domain', '域') }} ({{ t('connections.form.optional') }})</label>
+               <input type="text" id="conn-domain" v-model="formData.domain"
+                      class="w-full px-3 py-2 border border-border rounded-md shadow-sm bg-background text-foreground focus:outline-none focus:ring-1 focus:ring-primary focus:border-primary" />
+               -->
              </div>
-             <div v-if="isEditMode && formData.auth_method === 'key'">
-               <small class="block text-xs text-text-secondary">{{ t('connections.form.keyUpdateNote') }}</small>
-             </div>
-           </div>
-        </div>
+          </template>
+       </div>
 
         <!-- Advanced Options Section -->
         <div class="space-y-4 p-4 border border-border rounded-md bg-header/30">
@@ -388,7 +474,9 @@ const testButtonText = computed(() => {
 
       <!-- Form Actions -->
       <div class="flex justify-between items-center pt-5 mt-6 flex-shrink-0">
-         <div class="flex flex-col items-start gap-1"> <!-- Test Area -->
+         <!-- Test Area (Only show for SSH) -->
+         <!-- Use uppercase for comparison -->
+         <div v-if="formData.type === 'SSH'" class="flex flex-col items-start gap-1">
              <div class="flex items-center gap-2"> <!-- Button and Icon -->
                  <button type="button" @click="handleTestConnection" :disabled="isLoading || testStatus === 'testing'"
                          class="px-3 py-1.5 border border-border rounded-md text-sm font-medium text-text-secondary bg-background hover:bg-border focus:outline-none focus:ring-1 focus:ring-primary disabled:opacity-50 disabled:cursor-not-allowed inline-flex items-center transition-colors duration-150">
@@ -418,12 +506,14 @@ const testButtonText = computed(() => {
                  </div>
              </div>
          </div>
+         <!-- Placeholder for alignment when test button is hidden -->
+         <div v-else class="flex-1"></div>
          <div class="flex space-x-3"> <!-- Main Actions -->
-             <button type="submit" @click="handleSubmit" :disabled="isLoading || testStatus === 'testing'"
+             <button type="submit" @click="handleSubmit" :disabled="isLoading || (formData.type === 'SSH' && testStatus === 'testing')"
                      class="px-4 py-2 bg-button text-button-text rounded-md shadow-sm hover:bg-button-hover focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary disabled:opacity-50 disabled:cursor-not-allowed transition duration-150 ease-in-out">
                {{ submitButtonText }}
              </button>
-             <button type="button" @click="emit('close')" :disabled="isLoading || testStatus === 'testing'"
+             <button type="button" @click="emit('close')" :disabled="isLoading || (formData.type === 'SSH' && testStatus === 'testing')"
                      class="px-4 py-2 bg-transparent text-text-secondary border border-border rounded-md shadow-sm hover:bg-border hover:text-foreground focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary disabled:opacity-50 disabled:cursor-not-allowed transition duration-150 ease-in-out">
                {{ t('connections.form.cancel') }}
              </button>
diff --git a/packages/frontend/src/components/ConnectionList.vue b/packages/frontend/src/components/ConnectionList.vue
index 1173b2e..7b856a6 100644
--- a/packages/frontend/src/components/ConnectionList.vue
+++ b/packages/frontend/src/components/ConnectionList.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { onMounted, computed, ref, reactive } from 'vue'; // 统一导入
+import { onMounted, computed, ref, reactive, watch } from 'vue'; // 统一导入, 添加 watch
 import { storeToRefs } from 'pinia';
 import { useRouter } from 'vue-router';
 import { useI18n } from 'vue-i18n';
@@ -30,6 +30,11 @@ onMounted(() => {
   tagsStore.fetchTags(); // 获取标签列表
 });
 
+// Log received props for debugging
+watch(() => props.connections, (newVal: ConnectionInfo[]) => { // Add type annotation for newVal
+  console.log('[ConnectionList] Received connections prop:', JSON.stringify(newVal, null, 2));
+}, { immediate: true, deep: true });
+
 // 创建标签 ID 到名称的映射
 const tagMap = computed(() => {
     const map = new Map<number, string>();
@@ -176,7 +181,10 @@ const handleDelete = async (conn: ConnectionInfo) => {
                 </thead>
                 <tbody class="divide-y divide-border">
                     <tr v-for="conn in groupConnections" :key="conn.id" class="hover:bg-hover transition-colors duration-150">
-                        <td class="px-4 py-3 text-sm text-foreground whitespace-nowrap">{{ conn.name }}</td>
+                        <td class="px-4 py-3 text-sm text-foreground whitespace-nowrap">
+                          <!-- Icon logic removed for now -->
+                          {{ conn.name }}
+                        </td>
                         <td class="px-4 py-3 text-sm text-foreground whitespace-nowrap">{{ conn.host }}</td>
                         <td class="px-4 py-3 text-sm text-foreground whitespace-nowrap">{{ conn.port }}</td>
                         <td class="px-4 py-3 text-sm text-foreground whitespace-nowrap">{{ conn.username }}</td>
diff --git a/packages/frontend/src/locales/en-US.json b/packages/frontend/src/locales/en-US.json
index 7807a30..53b9abf 100644
--- a/packages/frontend/src/locales/en-US.json
+++ b/packages/frontend/src/locales/en-US.json
@@ -159,6 +159,9 @@
       "proxy": "Proxy:",
       "noProxy": "No Proxy",
       "tags": "Tags:",
+"connectionType": "Connection Type:",
+      "typeSsh": "SSH",
+      "typeRdp": "RDP",
       "sectionBasic": "Basic Information",
       "sectionAuth": "Authentication",
       "sectionAdvanced": "Advanced Options",
diff --git a/packages/frontend/src/locales/ja-JP.json b/packages/frontend/src/locales/ja-JP.json
index c72f201..7c43f69 100644
--- a/packages/frontend/src/locales/ja-JP.json
+++ b/packages/frontend/src/locales/ja-JP.json
@@ -159,6 +159,9 @@
         "proxy": "プロキシ:",
         "noProxy": "プロキシなし",
         "tags": "タグ:",
+"connectionType": "接続タイプ:",
+      "typeSsh": "SSH",
+      "typeRdp": "RDP",
         "sectionBasic": "基本情報",
         "sectionAuth": "認証情報",
         "sectionAdvanced": "詳細設定",
diff --git a/packages/frontend/src/locales/zh-CN.json b/packages/frontend/src/locales/zh-CN.json
index 5c2e52e..a1ecc6a 100644
--- a/packages/frontend/src/locales/zh-CN.json
+++ b/packages/frontend/src/locales/zh-CN.json
@@ -159,6 +159,9 @@
       "proxy": "代理:",
       "noProxy": "无代理",
       "tags": "标签:",
+"connectionType": "连接类型",
+      "typeSsh": "SSH",
+      "typeRdp": "RDP",
       "sectionBasic": "基本信息",
       "sectionAuth": "认证信息",
       "sectionAdvanced": "高级选项",
diff --git a/packages/frontend/src/stores/connections.store.ts b/packages/frontend/src/stores/connections.store.ts
index 2d5cfc6..a942ff3 100644
--- a/packages/frontend/src/stores/connections.store.ts
+++ b/packages/frontend/src/stores/connections.store.ts
@@ -5,6 +5,7 @@ import apiClient from '../utils/apiClient'; // 使用统一的 apiClient
 export interface ConnectionInfo {
     id: number;
     name: string;
+    type: 'SSH' | 'RDP'; // Use uppercase to match backend data
     host: string;
     port: number;
     username: string;
@@ -59,6 +60,7 @@ export const useConnectionsStore = defineStore('connections', {
                 console.log('[ConnectionsStore] Fetching latest connections from server...');
                 const response = await apiClient.get<ConnectionInfo[]>('/connections');
                 const freshData = response.data;
+                console.log('[ConnectionsStore] Data received from API:', JSON.stringify(freshData, null, 2)); // Log received data
                 const freshDataString = JSON.stringify(freshData);
 
                 // 3. 对比并更新
@@ -66,6 +68,7 @@ export const useConnectionsStore = defineStore('connections', {
                 if (currentDataString !== freshDataString) {
                     console.log('[ConnectionsStore] Connections data changed, updating state and cache.');
                     this.connections = freshData;
+                    console.log('[ConnectionsStore] State updated with fresh data:', JSON.stringify(this.connections, null, 2)); // Log state after update
                     localStorage.setItem(cacheKey, freshDataString); // 更新缓存
                 } else {
                     console.log('[ConnectionsStore] Connections data is up-to-date.');
@@ -88,6 +91,7 @@ export const useConnectionsStore = defineStore('connections', {
         // 更新参数类型以接受新的认证字段
         async addConnection(newConnectionData: {
             name: string;
+            type: 'SSH' | 'RDP'; // Use uppercase
             host: string;
             port: number;
             username: string;
@@ -122,7 +126,8 @@ export const useConnectionsStore = defineStore('connections', {
 
         // 更新连接 Action
         // 更新参数类型以包含 proxy_id 和 tag_ids
-        async updateConnection(connectionId: number, updatedData: Partial<Omit<ConnectionInfo, 'id' | 'created_at' | 'updated_at' | 'last_connected_at'> & { password?: string; private_key?: string; passphrase?: string; proxy_id?: number | null; tag_ids?: number[] }>) {
+        // Update parameter type to include 'type'
+        async updateConnection(connectionId: number, updatedData: Partial<Omit<ConnectionInfo, 'id' | 'created_at' | 'updated_at' | 'last_connected_at'> & { type?: 'SSH' | 'RDP'; password?: string; private_key?: string; passphrase?: string; proxy_id?: number | null; tag_ids?: number[] }>) {
             this.isLoading = true;
             this.error = null;
             try {