diff --git a/webapp/bootstrap/constant.php b/webapp/bootstrap/constant.php
index bf007a06..33f90355 100644
--- a/webapp/bootstrap/constant.php
+++ b/webapp/bootstrap/constant.php
@@ -70,4 +70,4 @@ const kHAT_RATE_VAL = 2;
 const kWantedLockType = 3;
 
 const kMaxHeroUpLevelNum = 2;
-const kMaxHeroUpQualityNum = 4;
+const kMaxHeroUpQualityNum = 2;
diff --git a/webapp/controller/HeroController.class.php b/webapp/controller/HeroController.class.php
index e02d1cd4..85f8aaae 100644
--- a/webapp/controller/HeroController.class.php
+++ b/webapp/controller/HeroController.class.php
@@ -169,9 +169,9 @@ class HeroController extends BaseAuthedController {
             $propertyChgService->addHeroChg();
             $propertyChgService->addBagChg();
             $propertyChgService->addUserChg();
-            $currLevelMeta = mt\HeroLevel::getByQualityLevel($heroDb['quality'], $heroDb['hero_lv']);
+            $currLevelMeta = mt\HeroLevel::getByLevel($heroDb['hero_lv']);
             if ($currLevelMeta) {
-                $nextLevelMeta = mt\HeroLevel::getByQualityLevel($heroDb['quality'], $heroDb['hero_lv'] + 1);
+                $nextLevelMeta = mt\HeroLevel::getByLevel($heroDb['hero_lv'] + 1);
                 if ($nextLevelMeta) {
                     Hero::update($heroUniId,
                                  array(
@@ -277,12 +277,12 @@ class HeroController extends BaseAuthedController {
             $this->_rspErr(100, 'server internal error');
             return;
         }
-        $currLevelMeta = mt\HeroLevel::getByQualityLevel($heroDb['quality'], $heroDb['hero_lv']);
+        $currLevelMeta = mt\HeroLevel::getByLevel($heroDb['hero_lv']);
         if (!$currLevelMeta) {
             $this->_rspErr(100, 'server internal error');
             return;
         }
-        $nextLevelMeta = mt\HeroLevel::getByQualityLevel($heroDb['quality'], $heroDb['hero_lv'] + 1);
+        $nextLevelMeta = mt\HeroLevel::getByLevel($heroDb['hero_lv'] + 1);
         if (!$nextLevelMeta) {
             $this->_rspErr(5, "It's already the highest level");
             return;
@@ -390,7 +390,7 @@ class HeroController extends BaseAuthedController {
             $this->_rspErr(5, "It's already the highest level1");
             return;
         }
-        $nextLevelMeta = mt\HeroLevel::getByQualityLevel($heroDb['quality'] + 1, $heroDb['hero_lv']);
+        $nextLevelMeta = mt\HeroLevel::getByLevel($heroDb['hero_lv']);
         if (!$nextLevelMeta) {
             $this->_rspErr(5, "It's already the highest level2");
             return;
diff --git a/webapp/mt/HeroLevel.php b/webapp/mt/HeroLevel.php
index e54145fc..66a74ada 100644
--- a/webapp/mt/HeroLevel.php
+++ b/webapp/mt/HeroLevel.php
@@ -14,19 +14,10 @@ class HeroLevel {
         return getXVal(self::getMetaList(), $id);
     }
 
-    public static function getByQualityLevel($quality, $level)
+    public static function getByLevel($level)
     {
-        self::mustBeQualityLevelHash();
-        return getXVal(self::$qualityLevelHash, $quality . '_' . $level, null);
-    }
-
-    public static function addRandAttr($levelMeta, $baseAttrs, &$dbAttrs)
-    {
-        $nums = explode(':', $levelMeta['rand_attrs_num']);
-        $num = rand($nums[0], $nums[1]);
-        $cfgAttrs = StrHelper::parseList($levelMeta['rand_attrs'], array('|', ':'));
-        AttrHelper::addRandAttrs($cfgAttrs, $num, $baseAttrs, $dbAttrs);
-        return true;
+        self::mustBeLevelHash();
+        return getXVal(self::$LevelHash, $$level, null);
     }
 
     protected static function getMetaList()
@@ -37,17 +28,17 @@ class HeroLevel {
         return self::$metaList;
     }
 
-    protected static function mustBeQualityLevelHash()
+    protected static function mustBeLevelHash()
     {
-        if (!self::$qualityLevelHash) {
-            self::$qualityLevelHash = array();
+        if (!self::$levelHash) {
+            self::$levelHash = array();
             foreach (self::getMetaList() as $meta) {
-                self::$qualityLevelHash[$meta['quality'] . '_' . $meta['level']] = $meta;
+                self::$levelHash[$meta['level']] = $meta;
             }
         }
     }
 
     protected static $metaList;
-    protected static $qualityLevelHash;
+    protected static $LevelHash;
 
 }