diff --git a/database.db b/database.db
index ed4881b..8d54ebd 100644
Binary files a/database.db and b/database.db differ
diff --git a/database.go b/database.go
index 31f9b20..03470b8 100644
--- a/database.go
+++ b/database.go
@@ -21,6 +21,20 @@ type User struct {
 	CreatedAt string
 }
 
+type FrpcInstance struct {
+	ID          int
+	UserID      int
+	Name        string
+	ServerAddr  string
+	ServerPort  string
+	AuthMethod  string
+	BootAtStart bool
+	RunUser     string
+	ConfigPath  string
+	CreatedAt   time.Time
+	CreatedBy   string
+}
+
 func InitDatabase(dbPath string) error {
 	InitUserDatabase(dbPath)
 	InitFrpcDatabase(dbPath)
@@ -362,10 +376,15 @@ func DBUpdateFrpcInstance(instance FrpcInstance) error {
 	return nil
 }
 
-func DBListFrpcInstances(userID int) ([]FrpcInstance, error) {
-	rows, err := frpcDB.Query("SELECT id, userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt FROM frpcInstances WHERE userID = ?", userID)
+func DBListFrpcInstances() ([]FrpcInstance, error) {
+	rows, err := frpcDB.Query(`
+		SELECT fi.id, fi.userID, fi.name, fi.serverAddr, fi.serverPort, fi.auth_method, 
+		       fi.bootAtStart, fi.runUser, fi.configPath, fi.createdAt, u.username
+		FROM frpcInstances fi
+		JOIN userLogin u ON fi.userID = u.userID
+	`)
 	if err != nil {
-		return nil, fmt.Errorf("failed to query frpc instances: %w", err)
+		return nil, fmt.Errorf("failed to query all frpc instances: %w", err)
 	}
 	defer rows.Close()
 
@@ -373,7 +392,7 @@ func DBListFrpcInstances(userID int) ([]FrpcInstance, error) {
 	for rows.Next() {
 		var instance FrpcInstance
 		var createdAtStr string
-		if err := rows.Scan(&instance.ID, &instance.UserID, &instance.Name, &instance.ServerAddr, &instance.ServerPort, &instance.AuthMethod, &instance.BootAtStart, &instance.RunUser, &instance.ConfigPath, &createdAtStr); err != nil {
+		if err := rows.Scan(&instance.ID, &instance.UserID, &instance.Name, &instance.ServerAddr, &instance.ServerPort, &instance.AuthMethod, &instance.BootAtStart, &instance.RunUser, &instance.ConfigPath, &createdAtStr, &instance.CreatedBy); err != nil {
 			return nil, fmt.Errorf("failed to scan frpc instance: %w", err)
 		}
 		instance.CreatedAt, _ = time.Parse(time.RFC3339, createdAtStr)
diff --git a/docs/api.md b/docs/api.md
index 7c78a26..f6a273b 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -642,7 +642,7 @@ Modify system-level settings such as instance name, boot-at-start configuration,
 **Auth Required:** Yes (token)  
 **Permission Level:** Admin
 
-Retrieve a list of all frpc instances.
+Retrieve a list of all frpc instances on the server.
 
 **Request Headers:**
 ```
@@ -662,6 +662,7 @@ X-Timestamp: 1704067200000
   "message": "instances retrieved successfully",
   "data": [
     {
+      "instanceID": 1,
       "name": "my_frpc",
       "serverAddr": "127.0.0.1",
       "serverPort": "7000",
@@ -669,7 +670,8 @@ X-Timestamp: 1704067200000
       "bootAtStart": true,
       "runUser": "root",
       "configPath": "./configs/superfrpc_user_my_frpc.toml",
-      "createdAt": "2024-01-01T00:00:00Z"
+      "createdAt": "2024-01-01T00:00:00Z",
+      "createdBy": "admin"
     }
   ]
 }
@@ -682,16 +684,31 @@ X-Timestamp: 1704067200000
   "message": "instances retrieved successfully",
   "data": [
     {
+      "instanceID": 1,
       "name": "my_frpc",
       "bootAtStart": true,
       "runUser": "root",
       "configPath": "./configs/superfrpc_user_my_frpc.toml",
-      "createdAt": "2024-01-01T00:00:00Z"
+      "createdAt": "2024-01-01T00:00:00Z",
+      "createdBy": "admin"
     }
   ]
 }
 ```
 
+| Field | Type | Description |
+|-------|------|-------------|
+| instanceID | int | Instance ID |
+| name | string | Instance name |
+| serverAddr | string | frps server address (admin/superuser only) |
+| serverPort | string | frps server port (admin/superuser only) |
+| auth_method | string | Authentication method (admin/superuser only) |
+| bootAtStart | bool | Auto-start on system boot |
+| runUser | string | User to run the frpc instance as |
+| configPath | string | Path to the configuration file |
+| createdAt | string | Instance creation time (ISO 8601 format) |
+| createdBy | string | Username of the user who created this instance |
+
 > Note: Visitor users do not see sensitive information (serverAddr, serverPort, auth_method).
 
 ---
diff --git a/frpAct.go b/frpAct.go
index 259e864..342a6aa 100644
--- a/frpAct.go
+++ b/frpAct.go
@@ -40,19 +40,6 @@ type CreateInstanceRequest struct {
 	Additional   map[string]interface{} `json:"additionalProperties"`
 }
 
-type FrpcInstance struct {
-	ID          int
-	UserID      int
-	Name        string
-	ServerAddr  string
-	ServerPort  string
-	AuthMethod  string
-	BootAtStart bool
-	RunUser     string
-	ConfigPath  string
-	CreatedAt   time.Time
-}
-
 var frpcDB *sql.DB
 
 func CloseFrpcDatabase() error {
@@ -610,11 +597,7 @@ func ListInstancesHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// rows, err := frpcDB.Query(`
-	// 	SELECT id, userID, name, serverAddr, serverPort, auth_method, bootAtStart, runUser, configPath, createdAt
-	// 	FROM frpcInstances WHERE userID = ?
-	// `, userID)
-	instanceList, err := DBListFrpcInstances(userID)
+	instanceList, err := DBListFrpcInstances()
 	if err != nil {
 		postLog.Error(fmt.Sprintf("[ListInstancesHandler] Failed to query instances: %v", err))
 		SendErrorResponse(w, http.StatusInternalServerError, "Failed to query instances")
@@ -633,6 +616,7 @@ func ListInstancesHandler(w http.ResponseWriter, r *http.Request) {
 			"runUser":     instance.RunUser,
 			"configPath":  instance.ConfigPath,
 			"createdAt":   instance.CreatedAt,
+			"createdBy":   instance.CreatedBy,
 		}
 
 		if userType == "visitor" {