diff --git a/src/routes/web.js b/src/routes/web.js
index 0a0420c6..97b8bc6c 100644
--- a/src/routes/web.js
+++ b/src/routes/web.js
@@ -146,6 +146,112 @@ router.post('/auth/logout', async (req, res) => {
   }
 });
 
+// 🔑 修改账户信息
+router.post('/auth/change-password', async (req, res) => {
+  try {
+    const token = req.headers['authorization']?.replace('Bearer ', '') || req.cookies?.adminToken;
+    
+    if (!token) {
+      return res.status(401).json({
+        error: 'No token provided',
+        message: 'Authentication required'
+      });
+    }
+
+    const { newUsername, currentPassword, newPassword } = req.body;
+
+    if (!currentPassword || !newPassword) {
+      return res.status(400).json({
+        error: 'Missing required fields',
+        message: 'Current password and new password are required'
+      });
+    }
+
+    // 验证新密码长度
+    if (newPassword.length < 8) {
+      return res.status(400).json({
+        error: 'Password too short',
+        message: 'New password must be at least 8 characters long'
+      });
+    }
+
+    // 获取当前会话
+    const sessionData = await redis.getSession(token);
+    if (!sessionData) {
+      return res.status(401).json({
+        error: 'Invalid token',
+        message: 'Session expired or invalid'
+      });
+    }
+
+    // 获取当前管理员信息
+    const adminData = await redis.getSession('admin_credentials');
+    if (!adminData) {
+      return res.status(500).json({
+        error: 'Admin data not found',
+        message: 'Administrator credentials not found'
+      });
+    }
+
+    // 验证当前密码
+    const isValidPassword = await bcrypt.compare(currentPassword, adminData.passwordHash);
+    if (!isValidPassword) {
+      logger.security(`🔒 Invalid current password attempt for user: ${sessionData.username}`);
+      return res.status(401).json({
+        error: 'Invalid current password',
+        message: 'Current password is incorrect'
+      });
+    }
+
+    // 准备更新的数据
+    const saltRounds = 10;
+    const newPasswordHash = await bcrypt.hash(newPassword, saltRounds);
+    
+    const updatedAdminData = {
+      ...adminData,
+      passwordHash: newPasswordHash,
+      updatedAt: new Date().toISOString()
+    };
+
+    // 如果提供了新用户名，则更新用户名
+    if (newUsername && newUsername.trim() && newUsername !== adminData.username) {
+      updatedAdminData.username = newUsername.trim();
+    }
+
+    // 更新Redis中的管理员凭据
+    await redis.setSession('admin_credentials', updatedAdminData);
+
+    // 更新data/init.json文件
+    const initFilePath = path.join(__dirname, '../../data/init.json');
+    if (fs.existsSync(initFilePath)) {
+      const initData = JSON.parse(fs.readFileSync(initFilePath, 'utf8'));
+      initData.adminUsername = updatedAdminData.username;
+      initData.adminPassword = newPassword; // 保存明文密码到init.json
+      initData.updatedAt = new Date().toISOString();
+      
+      fs.writeFileSync(initFilePath, JSON.stringify(initData, null, 2));
+    }
+
+    // 清除当前会话（强制用户重新登录）
+    await redis.deleteSession(token);
+
+    logger.success(`🔐 Admin password changed successfully for user: ${updatedAdminData.username}`);
+
+    res.json({
+      success: true,
+      message: 'Password changed successfully. Please login again.',
+      newUsername: updatedAdminData.username
+    });
+
+  } catch (error) {
+    logger.error('❌ Change password error:', error);
+    res.status(500).json({
+      error: 'Change password failed',
+      message: 'Internal server error'
+    });
+  }
+});
+
 // 🔄 刷新token
 router.post('/auth/refresh', async (req, res) => {
   try {
diff --git a/web/admin/app.js b/web/admin/app.js
index 4e52bc48..b358c66e 100644
--- a/web/admin/app.js
+++ b/web/admin/app.js
@@ -186,6 +186,20 @@ const app = createApp({
                 callbackUrl: ''
             },
             
+            // 用户菜单和账户修改相关
+            userMenuOpen: false,
+            currentUser: {
+                username: ''
+            },
+            showChangePasswordModal: false,
+            changePasswordLoading: false,
+            changePasswordForm: {
+                newUsername: '',
+                currentPassword: '',
+                newPassword: '',
+                confirmPassword: ''
+            },
+            
         }
     },
     
@@ -202,6 +216,15 @@ const app = createApp({
         // 初始化防抖函数
         this.setTrendPeriod = this.debounce(this._setTrendPeriod, 300);
         
+        // 添加全局点击事件监听器，用于关闭用户菜单
+        document.addEventListener('click', (event) => {
+            // 检查点击是否在用户菜单外部
+            const userMenuButton = event.target.closest('.relative');
+            if (!userMenuButton || !userMenuButton.querySelector('button[\@click*="userMenuOpen"]')) {
+                this.userMenuOpen = false;
+            }
+        });
+        
         if (this.authToken) {
             this.isLoggedIn = true;
             
@@ -784,6 +807,10 @@ const app = createApp({
                     this.authToken = data.token;
                     localStorage.setItem('authToken', this.authToken);
                     this.isLoggedIn = true;
+                    
+                    // 记录当前用户名
+                    this.currentUser.username = this.loginForm.username;
+                    
                     this.loadDashboard();
                 } else {
                     this.loginError = data.message;
@@ -796,6 +823,75 @@ const app = createApp({
             }
         },
         
+        // 用户菜单相关方法
+        openChangePasswordModal() {
+            this.userMenuOpen = false;
+            this.showChangePasswordModal = true;
+        },
+        
+        closeChangePasswordModal() {
+            this.showChangePasswordModal = false;
+            this.changePasswordForm = {
+                newUsername: '',
+                currentPassword: '',
+                newPassword: '',
+                confirmPassword: ''
+            };
+        },
+        
+        async changePassword() {
+            // 验证表单
+            if (this.changePasswordForm.newPassword !== this.changePasswordForm.confirmPassword) {
+                this.showToast('新密码和确认密码不一致', 'error');
+                return;
+            }
+            
+            if (this.changePasswordForm.newPassword.length < 8) {
+                this.showToast('新密码长度至少8位', 'error');
+                return;
+            }
+            
+            this.changePasswordLoading = true;
+            try {
+                const response = await fetch('/web/auth/change-password', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                        'Authorization': 'Bearer ' + this.authToken
+                    },
+                    body: JSON.stringify({
+                        newUsername: this.changePasswordForm.newUsername || undefined,
+                        currentPassword: this.changePasswordForm.currentPassword,
+                        newPassword: this.changePasswordForm.newPassword
+                    })
+                });
+                
+                const result = await response.json();
+                
+                if (result.success) {
+                    this.showToast('账户信息修改成功，即将退出登录', 'success');
+                    this.closeChangePasswordModal();
+                    
+                    // 将新的用户名更新到本地状态
+                    if (this.changePasswordForm.newUsername) {
+                        this.currentUser.username = this.changePasswordForm.newUsername;
+                    }
+                    
+                    // 延迟2秒后自动退出登录
+                    setTimeout(() => {
+                        this.logout();
+                    }, 2000);
+                } else {
+                    this.showToast(result.message || '修改失败', 'error');
+                }
+            } catch (error) {
+                console.error('Change password error:', error);
+                this.showToast('网络错误，请稍后再试', 'error');
+            } finally {
+                this.changePasswordLoading = false;
+            }
+        },
+        
         async logout() {
             if (this.authToken) {
                 try {
diff --git a/web/admin/index.html b/web/admin/index.html
index bd08e9bc..66d655d3 100644
--- a/web/admin/index.html
+++ b/web/admin/index.html
@@ -83,12 +83,42 @@
                             <p class="text-gray-600 text-sm leading-tight mt-0.5">管理后台</p>
                         </div>
                     </div>
-                    <button 
-                        @click="logout" 
-                        class="btn btn-danger px-6 py-3 flex items-center gap-2"
-                    >
-                        <i class="fas fa-sign-out-alt"></i>退出登录
-                    </button>
+                    <!-- 用户菜单 -->
+                    <div class="relative">
+                        <button 
+                            @click="userMenuOpen = !userMenuOpen"
+                            class="btn btn-primary px-4 py-3 flex items-center gap-2 relative"
+                        >
+                            <i class="fas fa-user-circle"></i>
+                            <span>{{ currentUser.username || 'Admin' }}</span>
+                            <i class="fas fa-chevron-down text-xs transition-transform duration-200" :class="{ 'rotate-180': userMenuOpen }"></i>
+                        </button>
+                        
+                        <!-- 悬浮菜单 -->
+                        <div 
+                            v-if="userMenuOpen" 
+                            class="absolute right-0 top-full mt-2 w-48 bg-white rounded-xl shadow-xl border border-gray-200 py-2 z-50"
+                            @click.stop
+                        >
+                            <button 
+                                @click="openChangePasswordModal"
+                                class="w-full px-4 py-3 text-left text-gray-700 hover:bg-gray-50 transition-colors flex items-center gap-3"
+                            >
+                                <i class="fas fa-key text-blue-500"></i>
+                                <span>修改账户信息</span>
+                            </button>
+                            
+                            <hr class="my-2 border-gray-200">
+                            
+                            <button 
+                                @click="logout"
+                                class="w-full px-4 py-3 text-left text-red-600 hover:bg-red-50 transition-colors flex items-center gap-3"
+                            >
+                                <i class="fas fa-sign-out-alt"></i>
+                                <span>退出登录</span>
+                            </button>
+                        </div>
+                    </div>
                 </div>
             </div>
 
@@ -2385,6 +2415,103 @@
             </div>
         </div>
 
+        <!-- 修改账户信息模态框 -->
+        <div v-if="showChangePasswordModal" class="fixed inset-0 modal z-50 flex items-center justify-center p-4">
+            <div class="modal-content w-full max-w-md p-8 mx-auto">
+                <div class="flex items-center justify-between mb-6">
+                    <div class="flex items-center gap-3">
+                        <div class="w-10 h-10 bg-gradient-to-br from-blue-500 to-blue-600 rounded-xl flex items-center justify-center">
+                            <i class="fas fa-key text-white"></i>
+                        </div>
+                        <h3 class="text-xl font-bold text-gray-900">修改账户信息</h3>
+                    </div>
+                    <button 
+                        @click="closeChangePasswordModal"
+                        class="text-gray-400 hover:text-gray-600 transition-colors"
+                    >
+                        <i class="fas fa-times text-xl"></i>
+                    </button>
+                </div>
+                
+                <form @submit.prevent="changePassword" class="space-y-6">
+                    <div>
+                        <label class="block text-sm font-semibold text-gray-700 mb-3">当前用户名</label>
+                        <input 
+                            :value="currentUser.username || 'Admin'" 
+                            type="text" 
+                            disabled
+                            class="form-input w-full bg-gray-100 cursor-not-allowed"
+                        >
+                        <p class="text-xs text-gray-500 mt-2">当前用户名，输入新用户名以修改</p>
+                    </div>
+                    
+                    <div>
+                        <label class="block text-sm font-semibold text-gray-700 mb-3">新用户名</label>
+                        <input 
+                            v-model="changePasswordForm.newUsername" 
+                            type="text" 
+                            class="form-input w-full"
+                            placeholder="输入新用户名（留空保持不变）"
+                        >
+                        <p class="text-xs text-gray-500 mt-2">留空表示不修改用户名</p>
+                    </div>
+                    
+                    <div>
+                        <label class="block text-sm font-semibold text-gray-700 mb-3">当前密码</label>
+                        <input 
+                            v-model="changePasswordForm.currentPassword" 
+                            type="password" 
+                            required
+                            class="form-input w-full"
+                            placeholder="请输入当前密码"
+                        >
+                    </div>
+                    
+                    <div>
+                        <label class="block text-sm font-semibold text-gray-700 mb-3">新密码</label>
+                        <input 
+                            v-model="changePasswordForm.newPassword" 
+                            type="password" 
+                            required
+                            class="form-input w-full"
+                            placeholder="请输入新密码"
+                        >
+                        <p class="text-xs text-gray-500 mt-2">密码长度至少8位</p>
+                    </div>
+                    
+                    <div>
+                        <label class="block text-sm font-semibold text-gray-700 mb-3">确认新密码</label>
+                        <input 
+                            v-model="changePasswordForm.confirmPassword" 
+                            type="password" 
+                            required
+                            class="form-input w-full"
+                            placeholder="请再次输入新密码"
+                        >
+                    </div>
+                    
+                    <div class="flex gap-3 pt-4">
+                        <button 
+                            type="button" 
+                            @click="closeChangePasswordModal" 
+                            class="flex-1 px-6 py-3 bg-gray-100 text-gray-700 rounded-xl font-semibold hover:bg-gray-200 transition-colors"
+                        >
+                            取消
+                        </button>
+                        <button 
+                            type="submit" 
+                            :disabled="changePasswordLoading"
+                            class="btn btn-primary flex-1 py-3 px-6 font-semibold"
+                        >
+                            <div v-if="changePasswordLoading" class="loading-spinner mr-2"></div>
+                            <i v-else class="fas fa-save mr-2"></i>
+                            {{ changePasswordLoading ? '保存中...' : '保存修改' }}
+                        </button>
+                    </div>
+                </form>
+            </div>
+        </div>
+
         <!-- Toast 通知组件 -->
         <div v-for="(toast, index) in toasts" :key="toast.id" 
              :class="['toast rounded-2xl p-4 shadow-2xl backdrop-blur-sm',