diff --git a/htdocs/lib/User/Exceptions.php b/htdocs/lib/User/Exceptions.php
new file mode 100644
index 0000000..e38f461
--- /dev/null
+++ b/htdocs/lib/User/Exceptions.php
@@ -0,0 +1,74 @@
+<?php namespace UElearning\User\Exception;
+/**
+ * @file
+ * 設定檔的例外
+ * 
+ * @package         UElearning
+ * @subpackage      User
+ * 
+ */
+
+/**
+ * 使用者帳號例外
+ * @since 3.0.0
+ */ 
+abstract class UserException extends \UnexpectedValueException {
+    
+    /**
+     * 指定的使用者名稱
+     * @type string
+     */ 
+    private $userId;
+    
+    /**
+     * 使用者帳號例外
+     * @param array $userId 輸入的使用者名稱
+     * @param string $description 描述
+     */ 
+    public function __construct($userId, $description) {
+        $this->userId = $userId;
+        parent::__construct($description);
+    }
+    
+    /**
+     * 取得輸入的資料庫系統名稱
+     * @return string 錯誤訊息內容
+     */ 
+    public function getUserId() {
+        return $this->userId;
+    }
+}
+
+// 使用者登入 ======================================================================
+/**
+ * 沒有找到此帳號
+ * @since 3.0.0
+ */ 
+class UserNoFoundException extends UserException {
+    public function __construct($userId) {
+        parent::__construct($userId, 'User: "'.$this->type.'" is no found.');
+    }
+}
+
+
+/**
+ * 使用者登入密碼錯誤
+ * @since 3.0.0
+ */ 
+class UserPasswordErrException extends UserException {
+    public function __construct($userId) {
+        parent::__construct($userId, 'User: "'.$this->type.'" password is wrong.');
+    }
+}
+
+// 建立使用者 ======================================================================
+/**
+ * 已有重複的使用者名稱
+ * @since 3.0.0
+ */ 
+class UserIdExistException extends UserException {
+    public function __construct($userId) {
+        parent::__construct($userId, 'UserId: "'.$this->type.'" is exist.');
+    }
+}
+
diff --git a/htdocs/lib/User/UserControl.php b/htdocs/lib/User/UserControl.php
index 5c5a5d9..7c39ffd 100644
--- a/htdocs/lib/User/UserControl.php
+++ b/htdocs/lib/User/UserControl.php
@@ -32,7 +32,7 @@ class UserControl {
      * @return bool 已有相同的帳號名稱
      * @since 3.0.0
      */ 
-    public function isHave($userName) {
+    public function isExist($userName) {
         // TODO: Fill code in 
     }