diff --git a/backend/src/main/java/com/designhub/controller/UserController.java b/backend/src/main/java/com/designhub/controller/UserController.java
index e4909c4..cbaae20 100644
--- a/backend/src/main/java/com/designhub/controller/UserController.java
+++ b/backend/src/main/java/com/designhub/controller/UserController.java
@@ -134,5 +134,16 @@ public class UserController {
         log.info("获取设计师列表及工作量: deptId={}", deptId);
         return Result.success(userService.getDesignersWithWorkload(deptId));
     }
+
+    @Operation(summary = "设置/取消管理员", description = "设置或取消用户的管理员身份")
+    @PutMapping("/{id}/admin")
+    public Result<Boolean> setAdmin(
+        @PathVariable Long id,
+        @RequestBody Map<String, Integer> params
+    ) {
+        Integer isAdmin = params.get("isAdmin");
+        log.info("设置用户管理员身份: userId={}, isAdmin={}", id, isAdmin);
+        return Result.success(userService.setAdmin(id, isAdmin));
+    }
 }
 
diff --git a/backend/src/main/java/com/designhub/entity/User.java b/backend/src/main/java/com/designhub/entity/User.java
index 8bc35e6..39a8781 100644
--- a/backend/src/main/java/com/designhub/entity/User.java
+++ b/backend/src/main/java/com/designhub/entity/User.java
@@ -75,6 +75,11 @@ public class User implements Serializable {
      */
     private Integer status;
 
+    /**
+     * 是否管理员：0-否 1-是
+     */
+    private Integer isAdmin;
+
     /**
      * 用户积分
      */
diff --git a/backend/src/main/java/com/designhub/service/UserService.java b/backend/src/main/java/com/designhub/service/UserService.java
index 33e2eda..549f75b 100644
--- a/backend/src/main/java/com/designhub/service/UserService.java
+++ b/backend/src/main/java/com/designhub/service/UserService.java
@@ -1262,4 +1262,27 @@ public class UserService {
         log.info("查询到{}个设计师", result.size());
         return result;
     }
+
+    /**
+     * 设置/取消管理员
+     */
+    @Transactional(rollbackFor = Exception.class)
+    public boolean setAdmin(Long userId, Integer isAdmin) {
+        log.info("设置用户管理员身份: userId={}, isAdmin={}", userId, isAdmin);
+        
+        User user = getUserById(userId);
+        if (user == null) {
+            throw new BusinessException("用户不存在");
+        }
+        
+        // 更新管理员标识
+        LambdaUpdateWrapper<User> updateWrapper = new LambdaUpdateWrapper<>();
+        updateWrapper.eq(User::getId, userId);
+        updateWrapper.set(User::getIsAdmin, isAdmin != null ? isAdmin : 0);
+        
+        boolean result = userMapper.update(null, updateWrapper) > 0;
+        log.info("设置管理员身份结果: userId={}, isAdmin={}, result={}", userId, isAdmin, result);
+        
+        return result;
+    }
 }
diff --git a/database/add_is_admin_field.sql b/database/add_is_admin_field.sql
new file mode 100644
index 0000000..92a36ca
--- /dev/null
+++ b/database/add_is_admin_field.sql
@@ -0,0 +1,11 @@
+-- 为 sys_user 表添加 is_admin 字段
+-- 作者：系统
+-- 日期：2026-01-03
+-- 说明：添加管理员标识字段，用于标识用户是否具有管理员权限
+
+ALTER TABLE `sys_user`
+ADD COLUMN `is_admin` TINYINT DEFAULT 0 COMMENT '是否管理员：0-否 1-是' AFTER `status`;
+
+-- 更新索引以提高查询性能
+CREATE INDEX `idx_is_admin` ON `sys_user` (`is_admin`);
+
diff --git a/frontend/src/api/user.ts b/frontend/src/api/user.ts
index 1e63c06..0fd4334 100644
--- a/frontend/src/api/user.ts
+++ b/frontend/src/api/user.ts
@@ -10,6 +10,7 @@ export interface User {
   deptId?: number;
   deptName?: string;
   status?: number;
+  isAdmin?: number;  // 是否管理员：0-否 1-是
   avatar?: string;
   createTime?: string;
   updateTime?: string;
@@ -161,3 +162,11 @@ export const getDesignersWithWorkload = async (deptId?: number): Promise<Designe
   return response.data || [];
 };
 
+/**
+ * 设置/取消管理员
+ */
+export const setAdmin = async (id: number, isAdmin: number): Promise<boolean> => {
+  const response = await request.put(`/users/${id}/admin`, { isAdmin });
+  return response.data;
+};
+
diff --git a/frontend/src/views/Settings.vue b/frontend/src/views/Settings.vue
index ac9fae8..7c7256b 100644
--- a/frontend/src/views/Settings.vue
+++ b/frontend/src/views/Settings.vue
@@ -348,6 +348,14 @@
                     <a-tag v-else color="orange" size="small">未分配</a-tag>
                   </template>
 
+                  <template v-else-if="column.key === 'isAdmin'">
+                    <a-tag v-if="record.isAdmin === 1" color="red" size="small">
+                      <Icon name="star" size="xs" style="margin-right: 4px;" />
+                      管理员
+                    </a-tag>
+                    <span v-else style="color: #999;">—</span>
+                  </template>
+
                   <template v-else-if="column.key === 'status'">
                     <span :class="['status-badge', record.status === 1 ? 'active' : 'inactive']">
                       {{ record.status === 1 ? '启用' : '禁用' }}
@@ -364,6 +372,15 @@
                         <Icon name="shuffle" size="sm" style="margin-right: 4px;" />
                         调整部门
                       </a-button>
+                      <a-popconfirm 
+                        :title="record.isAdmin === 1 ? '确定取消该用户的管理员身份？' : '确定设置该用户为管理员？'"
+                        @confirm="toggleUserAdmin(record)"
+                      >
+                        <a-button type="text" size="small" :type="record.isAdmin === 1 ? 'default' : 'primary'">
+                          <Icon :name="record.isAdmin === 1 ? 'lock' : 'star'" size="sm" style="margin-right: 4px;" />
+                          {{ record.isAdmin === 1 ? '取消管理员' : '设为管理员' }}
+                        </a-button>
+                      </a-popconfirm>
                       <a-popconfirm title="确定删除该用户？" @confirm="deleteUserFromCard(record)">
                         <a-button type="text" size="small" danger>
                           <Icon name="trash" size="sm" style="margin-right: 4px;" />
@@ -1605,9 +1622,10 @@ const userManagementColumns = [
   { title: 'ID', dataIndex: 'id', key: 'id', width: 80 },
   { title: '用户信息', key: 'userInfo', width: 280 },
   { title: '所属部门', key: 'department', width: 180 },
+  { title: '管理员', key: 'isAdmin', width: 100 },
   { title: '状态', key: 'status', width: 100 },
   { title: '创建时间', key: 'createTime', width: 160 },
-  { title: '操作', key: 'actions', width: 200, fixed: 'right' }
+  { title: '操作', key: 'actions', width: 250, fixed: 'right' }
 ]
 
 // 所有用户的扁平列表（用于表格展示）
@@ -2452,6 +2470,18 @@ const deleteUserFromCard = async (user: User) => {
   }
 }
 
+const toggleUserAdmin = async (user: User) => {
+  try {
+    const newAdminStatus = user.isAdmin === 1 ? 0 : 1
+    await userApi.setAdmin(user.id!, newAdminStatus)
+    message.success(newAdminStatus === 1 ? '已设置为管理员' : '已取消管理员身份')
+    await loadDepartmentUsers()
+  } catch (error) {
+    console.error('设置管理员失败:', error)
+    message.error('设置管理员失败')
+  }
+}
+
 const goToUserManagement = () => {
   router.push('/users')
 }