diff --git a/backend/api/routes/accounts.py b/backend/api/routes/accounts.py
index 0f2ce58..6ccd06a 100644
--- a/backend/api/routes/accounts.py
+++ b/backend/api/routes/accounts.py
@@ -208,7 +208,7 @@ async def start_service(
     account_id: int, 
     user: Dict[str, Any] = Depends(get_current_user)
 ):
-    """启动交易服务"""
+    """启动交易服务（需该账号 owner 或管理员）"""
     require_account_owner(account_id, user)
     try:
         program = program_name_for_account(account_id)
@@ -235,7 +235,7 @@ async def stop_service(
     account_id: int, 
     user: Dict[str, Any] = Depends(get_current_user)
 ):
-    """停止交易服务"""
+    """停止交易服务（需该账号 owner 或管理员）"""
     require_account_owner(account_id, user)
     try:
         program = program_name_for_account(account_id)
@@ -262,7 +262,7 @@ async def restart_service(
     account_id: int, 
     user: Dict[str, Any] = Depends(get_current_user)
 ):
-    """重启交易服务"""
+    """重启交易服务（需该账号 owner 或管理员）"""
     require_account_owner(account_id, user)
     try:
         program = program_name_for_account(account_id)
@@ -287,9 +287,7 @@ async def restart_service(
 async def ensure_trading_program(account_id: int, user: Dict[str, Any] = Depends(get_current_user)):
     if int(account_id) <= 0:
         raise HTTPException(status_code=400, detail="account_id 必须 >= 1")
-    # 允许管理员或该账号 owner 执行（owner 用于“我重建配置再启动”）
-    if (user.get("role") or "user") != "admin":
-        require_account_owner(int(account_id), user)
+    require_account_owner(int(account_id), user)
     sup = ensure_account_program(int(account_id))
     if not sup.ok:
         raise HTTPException(status_code=500, detail=sup.error or "生成 supervisor 配置失败")
diff --git a/backend/api/routes/admin.py b/backend/api/routes/admin.py
index e0afcae..430649b 100644
--- a/backend/api/routes/admin.py
+++ b/backend/api/routes/admin.py
@@ -150,6 +150,8 @@ async def grant_user_account(user_id: int, account_id: int, payload: GrantReq, _
     if not a:
         raise HTTPException(status_code=404, detail="账号不存在")
     try:
+        if payload.role == "owner":
+            UserAccountMembership.clear_other_owners_for_account(int(account_id), int(user_id))
         UserAccountMembership.add(int(user_id), int(account_id), role=payload.role)
     except Exception as e:
         raise HTTPException(
diff --git a/backend/database/models.py b/backend/database/models.py
index 6826513..29e8bfe 100644
--- a/backend/database/models.py
+++ b/backend/database/models.py
@@ -217,6 +217,14 @@ class UserAccountMembership:
             (int(user_id), int(account_id)),
         )
 
+    @staticmethod
+    def clear_other_owners_for_account(account_id: int, keep_user_id: int):
+        """每个账号仅允许一名 owner：将本账号下其他用户的 owner 降为 viewer。"""
+        db.execute_update(
+            "UPDATE user_account_memberships SET role = 'viewer' WHERE account_id = %s AND user_id != %s AND role = 'owner'",
+            (int(account_id), int(keep_user_id)),
+        )
+
     @staticmethod
     def list_for_user(user_id: int):
         return db.execute_query(
diff --git a/frontend/src/components/AdminDashboard.jsx b/frontend/src/components/AdminDashboard.jsx
index 126c182..c9bc3e9 100644
--- a/frontend/src/components/AdminDashboard.jsx
+++ b/frontend/src/components/AdminDashboard.jsx
@@ -187,7 +187,7 @@ const UserAccountGroup = ({ user, allAccounts, onServiceAction }) => {
                 disabled={associating}
               >
                 <option value="viewer">观察者 (Viewer)</option>
-                <option value="trader">交易员 (Trader)</option>
+                <option value="owner">拥有者 (Owner，每账号仅一个)</option>
               </select>
               <button 
                 onClick={handleGrant}
diff --git a/frontend/src/components/ConfigPanel.jsx b/frontend/src/components/ConfigPanel.jsx
index bfef6d1..54c8824 100644
--- a/frontend/src/components/ConfigPanel.jsx
+++ b/frontend/src/components/ConfigPanel.jsx
@@ -310,10 +310,10 @@ const ConfigPanel = () => {
     setMessage('')
     try {
       const res = await api.ensureAccountTradingProgram(accountId)
-      setMessage(`已生成/刷新 supervisor 配置：${res.program || ''}`)
+      setMessage(`已成功生成进程配置文件：${res.program || ''}`)
       await loadAccountTradingStatus()
     } catch (error) {
-      setMessage('生成 supervisor 配置失败: ' + (error.message || '未知错误'))
+      setMessage('生成进程配置失败：' + (error.message || '未知错误'))
     } finally {
       setSystemBusy(false)
     }
@@ -906,7 +906,7 @@ const ConfigPanel = () => {
           <p>修改配置后，交易系统将在下次扫描时自动使用新配置</p>
         </div>
 
-        {/* 我的交易进程（按账号；owner/admin 可启停） */}
+        {/* 我的交易进程（按账号；该账号 owner 或 admin 可启停） */}
         {currentAccountMeta && currentAccountMeta.status === 'active' ? (
         <div className="system-section">
           <div className="system-header">
@@ -924,21 +924,21 @@ const ConfigPanel = () => {
             <button type="button" className="system-btn primary" onClick={handleTriggerScan} disabled={systemBusy || !accountTradingStatus?.running} title="通知该账号交易进程立即执行一次市场扫描（无需重启）">
               立即扫描
             </button>
-            <button type="button" className="system-btn" onClick={handleAccountTradingEnsure} disabled={systemBusy} title="为该账号生成/刷新 supervisor program 配置（需要 owner/admin）">
+            <button type="button" className="system-btn" onClick={handleAccountTradingEnsure} disabled={systemBusy} title="为该账号生成/刷新 supervisor 进程配置文件（需该账号 owner 或管理员）">
               生成配置
             </button>
-            <button type="button" className="system-btn" onClick={handleAccountTradingStop} disabled={systemBusy || !accountTradingStatus?.running} title="停止该账号交易进程（需要 owner/admin）">
+            <button type="button" className="system-btn" onClick={handleAccountTradingStop} disabled={systemBusy || !accountTradingStatus?.running} title="停止该账号交易进程（需该账号 owner 或管理员）">
               停止
             </button>
-            <button type="button" className="system-btn" onClick={handleAccountTradingStart} disabled={systemBusy || accountTradingStatus?.running} title="启动该账号交易进程（需要 owner/admin）">
+            <button type="button" className="system-btn" onClick={handleAccountTradingStart} disabled={systemBusy || accountTradingStatus?.running} title="启动该账号交易进程（需该账号 owner 或管理员）">
               启动
             </button>
-            <button type="button" className="system-btn primary" onClick={handleAccountTradingRestart} disabled={systemBusy} title="重启该账号交易进程（需要 owner/admin）">
+            <button type="button" className="system-btn primary" onClick={handleAccountTradingRestart} disabled={systemBusy} title="重启该账号交易进程（需该账号 owner 或管理员）">
               重启
             </button>
           </div>
           <div className="system-hint">
-            提示：若按钮报“无权限”，请让管理员在用户授权里把该账号分配为 owner；若报 supervisor 相关错误，请检查后端对 `/www/server/panel/plugin/supervisor` 的写权限与 supervisorctl 可执行权限。
+            提示：生成配置、启停/重启进程、修改 API 密钥均需该账号的 owner（每账号仅一个）。若报“无权限”请让管理员将该账号分配为 owner；若报 supervisor 相关错误，请检查后端写权限与 supervisorctl。
           </div>
           {accountTradingErr ? (
             <div className="system-hint" style={{ color: '#b00020' }}>
diff --git a/frontend/src/services/api.js b/frontend/src/services/api.js
index a3185e4..41a257a 100644
--- a/frontend/src/services/api.js
+++ b/frontend/src/services/api.js
@@ -816,10 +816,11 @@ export const api = {
   grantUserAccount: async (userId, accountId, role = 'viewer') => {
     const uid = Number(userId);
     const aid = Number(accountId);
+    const roleVal = role === 'owner' ? 'owner' : 'viewer';
     const response = await fetch(buildUrl(`/api/admin/users/${uid}/accounts/${aid}`), {
       method: 'PUT',
       headers: withAuthHeaders({ 'Content-Type': 'application/json' }),
-      body: JSON.stringify({ role: role === 'owner' ? 'owner' : 'viewer' }),
+      body: JSON.stringify({ role: roleVal }),
     });
     if (!response.ok) {
       const error = await response.json().catch(() => ({ detail: '授权失败' }));