diff --git a/Dockerfile b/Dockerfile
index 95023b9..15ca582 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,8 +19,8 @@ FROM node:20-alpine
 LABEL maintainer="AIClient2API Team"
 LABEL description="Docker image for AIClient2API server"
 
-# 安装必要的系统工具（tar 用于更新功能，git 用于版本检查）
-RUN apk add --no-cache tar git
+# 安装必要的系统工具（tar 用于更新功能，git 用于版本检查，procps 用于系统监控）
+RUN apk add --no-cache tar git procps
 
 # 设置工作目录
 WORKDIR /app
diff --git a/VERSION b/VERSION
index 46b81d8..6ceb272 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.11.0
+2.11.1
diff --git a/src/ui-modules/system-monitor.js b/src/ui-modules/system-monitor.js
index 23e25b7..a37fc40 100644
--- a/src/ui-modules/system-monitor.js
+++ b/src/ui-modules/system-monitor.js
@@ -57,8 +57,31 @@ export function getProcessCpuUsagePercent(pid) {
         const isWindows = process.platform === 'win32';
         let cpuPercent = 0;
 
-        if (isWindows) {
-            // Windows 下使用 PowerShell 获取进程的 CPU 使用率
+        // 优先处理当前进程，使用 Node.js 内置的 process.cpuUsage()，这在所有平台上都更准确且无需外部命令
+        if (pid === process.pid) {
+            const usage = process.cpuUsage();
+            const timestamp = Date.now();
+            const totalMicroseconds = usage.user + usage.system;
+            const prevInfo = processCpuInfoMap.get(pid);
+
+            if (prevInfo && prevInfo.totalMicroseconds !== undefined) {
+                const timeDiff = (timestamp - prevInfo.timestamp) * 1000; // 转换为微秒
+                const processTimeDiff = totalMicroseconds - prevInfo.totalMicroseconds;
+
+                if (timeDiff > 0) {
+                    const cpuCount = os.cpus().length;
+                    cpuPercent = (processTimeDiff / timeDiff) * 100;
+                    // Node.js 返回的是所有核心累加的使用量，归一化到 0-100%
+                    cpuPercent = cpuPercent / cpuCount;
+                }
+            }
+
+            processCpuInfoMap.set(pid, {
+                totalMicroseconds,
+                timestamp
+            });
+        } else if (isWindows) {
+            // Windows 下使用 PowerShell 获取其他进程的 CPU 使用率
             // CPU = (Process.TotalProcessorTime / ElapsedTime) / ProcessorCount
             const command = `powershell -Command "Get-Process -Id ${pid} | Select-Object -ExpandProperty TotalProcessorTime | ForEach-Object { $_.TotalSeconds }"`;
             const output = execSync(command, { encoding: 'utf8' }).trim();
@@ -67,7 +90,7 @@ export function getProcessCpuUsagePercent(pid) {
 
             if (!isNaN(totalProcessorSeconds)) {
                 const prevInfo = processCpuInfoMap.get(pid);
-                if (prevInfo) {
+                if (prevInfo && prevInfo.totalProcessorSeconds !== undefined) {
                     const timeDiff = (timestamp - prevInfo.timestamp) / 1000; // 转换为秒
                     const processTimeDiff = totalProcessorSeconds - prevInfo.totalProcessorSeconds;
                     
@@ -85,11 +108,17 @@ export function getProcessCpuUsagePercent(pid) {
                 });
             }
         } else {
-            // Linux/macOS 使用 ps 命令直接获取
-            const output = execSync(`ps -p ${pid} -o %cpu`, { encoding: 'utf8' });
-            const lines = output.trim().split('\n');
-            if (lines.length >= 2) {
-                cpuPercent = parseFloat(lines[1].trim());
+            // Linux/macOS 使用 ps 命令获取其他进程的 CPU 使用率
+            // 增加 2> /dev/null 以防在 BusyBox 等环境下报错干扰日志
+            try {
+                const output = execSync(`ps -p ${pid} -o %cpu 2>/dev/null`, { encoding: 'utf8' });
+                const lines = output.trim().split('\n');
+                if (lines.length >= 2) {
+                    cpuPercent = parseFloat(lines[1].trim());
+                }
+            } catch (e) {
+                // 如果 ps -p 失败，尝试更通用的 ps 方式或直接忽略
+                cpuPercent = 0;
             }
         }