diff --git a/packages/frontend/src/components/StatusCharts.vue b/packages/frontend/src/components/StatusCharts.vue
index b22d808..907fd4e 100644
--- a/packages/frontend/src/components/StatusCharts.vue
+++ b/packages/frontend/src/components/StatusCharts.vue
@@ -7,9 +7,9 @@
       </div>
     </div>
     <div class="chart-container bg-header rounded p-3">
-      <h5 class="text-sm font-medium mb-2 text-text-secondary">内存使用率</h5>
+      <h5 class="text-sm font-medium mb-2 text-text-secondary">{{ memoryChartTitle }}</h5>
       <div class="chart-wrapper h-40">
-        <Line :data="memoryChartData" :options="percentageChartOptions" :key="memoryChartKey" />
+        <Line :data="memoryChartData" :options="memoryChartOptions" :key="memoryChartKey" />
       </div>
     </div>
     <div class="chart-container bg-header rounded p-3">
@@ -47,19 +47,37 @@ ChartJS.register(
   CategoryScale
 );
 
+// Define a more specific type for serverStatus if possible, or use as is if memUsed/memTotal are reliably present.
+// For now, assuming props.serverStatus will have memUsed and memTotal in MB.
+interface ServerStatusData {
+  cpuPercent?: number;
+  memPercent?: number; // Will be ignored for chart data, but kept for other potential uses
+  memUsed?: number;    // in MB
+  memTotal?: number;   // in MB
+  netRxRate?: number;  // in Bytes/sec
+  netTxRate?: number;  // in Bytes/sec
+  // ... other properties if needed
+}
+
 const props = defineProps<{
-  serverStatus: any;
+  serverStatus: ServerStatusData | null;
 }>();
 
 const MAX_DATA_POINTS = 60;
-const KB_TO_MB_THRESHOLD = 1024;
+const KB_TO_MB_THRESHOLD = 1024; // For network
+const MB_TO_GB_THRESHOLD = 1024; // For memory
 
 const cpuChartKey = ref(0);
 const memoryChartKey = ref(0);
 const networkChartKey = ref(0);
+
 const networkRateUnitIsMB = ref(false);
 const networkChartTitle = ref('网络速度 (KB/s)');
 
+const memoryUnitIsGB = ref(false);
+const memoryChartTitle = ref('内存使用情况 (MB)');
+
+
 const initialLabels = Array.from({ length: MAX_DATA_POINTS }, (_, i) => `-${(MAX_DATA_POINTS - 1 - i)}s`);
 
 const cpuChartData = ref({
@@ -82,7 +100,7 @@ const memoryChartData = ref({
   labels: [...initialLabels],
   datasets: [
     {
-      label: '内存使用率 (%)',
+      label: '内存使用 (MB)', // Initial label
       backgroundColor: 'rgba(255, 99, 132, 0.2)',
       borderColor: 'rgba(255, 99, 132, 1)',
       borderWidth: 1,
@@ -131,14 +149,56 @@ const baseChartOptions: Omit<ChartOptions<'line'>, 'scales'> = {
   interaction: { mode: 'index', intersect: false },
 };
 
-const percentageChartOptions = ref<ChartOptions<'line'>>({
+const percentageChartOptions = ref<ChartOptions<'line'>>({ // For CPU
   ...baseChartOptions,
   scales: {
     y: {
       beginAtZero: true,
       min: 0,
       max: 100,
-      ticks: { color: '#9CA3AF' },
+      ticks: { color: '#9CA3AF', callback: value => `${value}%` },
+      grid: { color: 'rgba(156, 163, 175, 0.1)' },
+    },
+    x: {
+      ticks: { display: false, color: '#9CA3AF', maxRotation: 0, minRotation: 0 },
+      grid: { display: false },
+    },
+  },
+});
+
+const memoryChartOptions = ref<ChartOptions<'line'>>({
+  ...baseChartOptions,
+  plugins: {
+    ...baseChartOptions.plugins,
+    tooltip: {
+      ...baseChartOptions.plugins?.tooltip,
+      callbacks: {
+        label: (context: TooltipItem<'line'>) => {
+          let label = context.dataset.label || '';
+          if (label) {
+            label = label.substring(0, label.lastIndexOf('(') -1); // Remove old unit from label
+            label += ': ';
+          }
+          if (context.parsed.y !== null) {
+            const value = parseFloat(context.parsed.y.toFixed(1));
+            label += `${value} ${memoryUnitIsGB.value ? 'GB' : 'MB'}`;
+          }
+          return label;
+        },
+      },
+    },
+  },
+  scales: {
+    y: {
+      beginAtZero: true,
+      min: 0,
+      // max will be set dynamically based on memTotal
+      ticks: {
+        color: '#9CA3AF',
+        callback: function(value) {
+          return `${parseFloat(Number(value).toFixed(1))}`; // Unit will be implicit from title or tooltip
+        }
+      },
       grid: { color: 'rgba(156, 163, 175, 0.1)' },
     },
     x: {
@@ -157,7 +217,8 @@ const networkChartOptions = ref<ChartOptions<'line'>>({
       callbacks: {
         label: (context: TooltipItem<'line'>) => {
           let label = context.dataset.label || '';
-          if (label) {
+           if (label) {
+            label = label.substring(0, label.lastIndexOf('(') -1); // Remove old unit from label
             label += ': ';
           }
           if (context.parsed.y !== null) {
@@ -173,7 +234,6 @@ const networkChartOptions = ref<ChartOptions<'line'>>({
     y: {
       beginAtZero: true,
       min: 0,
-      // max will be set dynamically
       ticks: {
         color: '#9CA3AF',
         callback: function(value) {
@@ -190,7 +250,7 @@ const networkChartOptions = ref<ChartOptions<'line'>>({
 });
 
 
-const updateCharts = (newStatus: any) => {
+const updateCharts = (newStatus: ServerStatusData | null) => {
   if (!newStatus) return;
 
   // Update CPU Chart
@@ -202,38 +262,88 @@ const updateCharts = (newStatus: any) => {
   }
 
   // Update Memory Chart
-  if (typeof newStatus.memPercent === 'number') {
-    const newMemData = [...memoryChartData.value.datasets[0].data];
-    newMemData.shift();
-    newMemData.push(parseFloat(newStatus.memPercent.toFixed(1)));
-    memoryChartData.value = { ...memoryChartData.value, datasets: [{ ...memoryChartData.value.datasets[0], data: newMemData }] };
+  if (typeof newStatus.memUsed === 'number' && typeof newStatus.memTotal === 'number') {
+    let currentMemUsed = newStatus.memUsed; // MB
+    const memTotal = newStatus.memTotal;   // MB
+    let currentData = [...memoryChartData.value.datasets[0].data];
+
+    if (!memoryUnitIsGB.value && (memTotal >= MB_TO_GB_THRESHOLD || currentMemUsed >= MB_TO_GB_THRESHOLD)) {
+      memoryUnitIsGB.value = true;
+      memoryChartTitle.value = '内存使用情况 (GB)';
+      memoryChartData.value.datasets[0].label = '内存使用 (GB)';
+      currentData = currentData.map(d => parseFloat((d / MB_TO_GB_THRESHOLD).toFixed(1)));
+      memoryChartKey.value++; // Force re-render
+    } else if (memoryUnitIsGB.value && memTotal < MB_TO_GB_THRESHOLD && currentMemUsed < MB_TO_GB_THRESHOLD) {
+      // This case is less likely if total is large, but handles potential fluctuations or incorrect initial state
+      memoryUnitIsGB.value = false;
+      memoryChartTitle.value = '内存使用情况 (MB)';
+      memoryChartData.value.datasets[0].label = '内存使用 (MB)';
+      currentData = currentData.map(d => parseFloat((d * MB_TO_GB_THRESHOLD).toFixed(1)));
+      memoryChartKey.value++;
+    }
+    
+    let newMemValue;
+    if (memoryUnitIsGB.value) {
+      newMemValue = parseFloat((currentMemUsed / MB_TO_GB_THRESHOLD).toFixed(1));
+    } else {
+      newMemValue = parseFloat(currentMemUsed.toFixed(1));
+    }
+
+    currentData.shift();
+    currentData.push(newMemValue);
+    memoryChartData.value = { ...memoryChartData.value, datasets: [{ ...memoryChartData.value.datasets[0], data: currentData }] };
+
+    if (memoryChartOptions.value.scales?.y && typeof memTotal === 'number') {
+      let yAxisTopValue = memoryUnitIsGB.value
+        ? parseFloat((memTotal / MB_TO_GB_THRESHOLD).toFixed(1))
+        : parseFloat(memTotal.toFixed(1));
+
+      // Ensure the yAxisTopValue is at least slightly larger than the max data point if data exceeds total.
+      // Also, handle cases where memTotal might be 0 or very small.
+      const currentMaxDataPoint = Math.max(...currentData, 0);
+      // The y-axis max should primarily be driven by memTotal.
+      // If current data somehow exceeds memTotal (which shouldn't happen for 'used' vs 'total'),
+      // then the axis should expand. Otherwise, stick to memTotal.
+      yAxisTopValue = Math.max(yAxisTopValue, currentMaxDataPoint);
+      
+      // If memTotal is 0 (and thus yAxisTopValue is 0 after parseFloat), set a small default max.
+      if (yAxisTopValue === 0) {
+        yAxisTopValue = memoryUnitIsGB.value ? 1 : 100; // Default small max if total is 0
+      } else {
+        // Add a very tiny buffer if yAxisTopValue is not 0, to ensure the top line is visible if data hits the max.
+        // This helps if Chart.js clips data exactly at the 'max'.
+        // For example, if max is 8.0GB, a data point of 8.0GB might be at the very edge.
+        // A small increment ensures it's clearly within the chart area.
+        const epsilon = memoryUnitIsGB.value ? 0.01 : 1;
+        yAxisTopValue += epsilon;
+        // Re-round after adding epsilon to maintain clean ticks if possible
+        if (memoryUnitIsGB.value) {
+            yAxisTopValue = Math.ceil(yAxisTopValue * 100) / 100; // Round to 2 decimal places for GB after epsilon
+        } else {
+            yAxisTopValue = Math.ceil(yAxisTopValue); // Round to next integer for MB after epsilon
+        }
+      }
+      memoryChartOptions.value.scales.y.max = yAxisTopValue;
+    }
   }
 
+
   // Update Network Chart
   let currentNetRxRateKB = (newStatus.netRxRate || 0) / 1024;
   let currentNetTxRateKB = (newStatus.netTxRate || 0) / 1024;
+  let newNetRxData = [...networkChartData.value.datasets[0].data];
+  let newNetTxData = [...networkChartData.value.datasets[1].data];
 
-  const newNetRxData = [...networkChartData.value.datasets[0].data];
-  const newNetTxData = [...networkChartData.value.datasets[1].data];
-
-  // Check if unit needs to be switched to MB/s
   if (!networkRateUnitIsMB.value && (currentNetRxRateKB >= KB_TO_MB_THRESHOLD || currentNetTxRateKB >= KB_TO_MB_THRESHOLD)) {
     networkRateUnitIsMB.value = true;
     networkChartTitle.value = '网络速度 (MB/s)';
-
-    // Convert existing data to MB/s
-    networkChartData.value.datasets[0].data = newNetRxData.map(d => parseFloat((d / KB_TO_MB_THRESHOLD).toFixed(1)));
-    networkChartData.value.datasets[1].data = newNetTxData.map(d => parseFloat((d / KB_TO_MB_THRESHOLD).toFixed(1)));
-    
-    // Update dataset labels
     networkChartData.value.datasets[0].label = '下载 (MB/s)';
     networkChartData.value.datasets[1].label = '上传 (MB/s)';
-    
-    // Force chart re-render for label and unit changes
+    newNetRxData = newNetRxData.map(d => parseFloat((d / KB_TO_MB_THRESHOLD).toFixed(1)));
+    newNetTxData = newNetTxData.map(d => parseFloat((d / KB_TO_MB_THRESHOLD).toFixed(1)));
     networkChartKey.value++; 
   }
   
-  // Prepare new data points based on current unit
   let newRxValue, newTxValue;
   if (networkRateUnitIsMB.value) {
     newRxValue = parseFloat((currentNetRxRateKB / KB_TO_MB_THRESHOLD).toFixed(1));
@@ -243,30 +353,25 @@ const updateCharts = (newStatus: any) => {
     newTxValue = parseFloat(currentNetTxRateKB.toFixed(1));
   }
 
-  const finalNewNetRxData = [...networkChartData.value.datasets[0].data];
-  finalNewNetRxData.shift();
-  finalNewNetRxData.push(newRxValue);
-
-  const finalNewNetTxData = [...networkChartData.value.datasets[1].data];
-  finalNewNetTxData.shift();
-  finalNewNetTxData.push(newTxValue);
+  newNetRxData.shift();
+  newNetRxData.push(newRxValue);
+  newNetTxData.shift();
+  newNetTxData.push(newTxValue);
   
   networkChartData.value = {
     ...networkChartData.value,
     datasets: [
-      { ...networkChartData.value.datasets[0], data: finalNewNetRxData },
-      { ...networkChartData.value.datasets[1], data: finalNewNetTxData },
+      { ...networkChartData.value.datasets[0], data: newNetRxData },
+      { ...networkChartData.value.datasets[1], data: newNetTxData },
     ],
   };
 
-  // Dynamically adjust Y-axis for network chart
-  const allNetworkData = [...finalNewNetRxData, ...finalNewNetTxData];
-  const minMax = networkRateUnitIsMB.value ? 1 : 10; // Min max for MB/s or KB/s
-  const maxNetworkRate = Math.max(...allNetworkData, minMax); 
-  
   if (networkChartOptions.value.scales?.y) {
-    const roundingFactor = networkRateUnitIsMB.value ? 1 : 10; // Round to next 1 or 10
-    const buffer = networkRateUnitIsMB.value ? 1 : 10; // Buffer for MB/s or KB/s
+    const allNetworkData = [...newNetRxData, ...newNetTxData];
+    const minMax = networkRateUnitIsMB.value ? 1 : 10;
+    const maxNetworkRate = Math.max(...allNetworkData, minMax); 
+    const roundingFactor = networkRateUnitIsMB.value ? 1 : 10;
+    const buffer = networkRateUnitIsMB.value ? 1 : 10;
     networkChartOptions.value.scales.y.max = Math.ceil(maxNetworkRate / roundingFactor) * roundingFactor + buffer;
   }
 };