diff --git a/testable-agent/src/main/java/com/alibaba/testable/agent/util/DiagnoseUtil.java b/testable-agent/src/main/java/com/alibaba/testable/agent/util/DiagnoseUtil.java
index e1193d1..7e570e2 100644
--- a/testable-agent/src/main/java/com/alibaba/testable/agent/util/DiagnoseUtil.java
+++ b/testable-agent/src/main/java/com/alibaba/testable/agent/util/DiagnoseUtil.java
@@ -26,8 +26,7 @@ public class DiagnoseUtil {
     private static void setupDiagnose(AnnotationNode an, String fieldDiagnose) {
         LogLevel level = AnnotationUtil.getAnnotationParameter(an, fieldDiagnose, null, LogLevel.class);
         if (level != null) {
-            LogUtil.setLevel(level == LogLevel.ENABLE ? LogUtil.LogLevel.LEVEL_DIAGNOSE :
-                (level == LogLevel.VERBOSE ? LogUtil.LogLevel.LEVEL_VERBOSE : LogUtil.LogLevel.LEVEL_MUTE));
+            LogUtil.setLevel(level);
         }
     }
 
diff --git a/testable-agent/src/main/java/com/alibaba/testable/agent/util/GlobalConfig.java b/testable-agent/src/main/java/com/alibaba/testable/agent/util/GlobalConfig.java
index 9a30025..c478669 100644
--- a/testable-agent/src/main/java/com/alibaba/testable/agent/util/GlobalConfig.java
+++ b/testable-agent/src/main/java/com/alibaba/testable/agent/util/GlobalConfig.java
@@ -1,5 +1,6 @@
 package com.alibaba.testable.agent.util;
 
+import com.alibaba.testable.core.model.LogLevel;
 import com.alibaba.testable.core.model.MockScope;
 import com.alibaba.testable.core.util.LogUtil;
 
@@ -20,13 +21,13 @@ public class GlobalConfig {
 
     public static boolean setLogLevel(String level) {
         if (level.equals(MUTE)) {
-            LogUtil.setDefaultLevel(LogUtil.LogLevel.LEVEL_MUTE);
+            LogUtil.setDefaultLevel(LogLevel.DISABLE);
             return true;
         } else if (level.equals(DEBUG)) {
-            LogUtil.setDefaultLevel(LogUtil.LogLevel.LEVEL_DIAGNOSE);
+            LogUtil.setDefaultLevel(LogLevel.ENABLE);
             return true;
         } else if (level.equals(VERBOSE)) {
-            LogUtil.setDefaultLevel(LogUtil.LogLevel.LEVEL_VERBOSE);
+            LogUtil.setDefaultLevel(LogLevel.VERBOSE);
             return true;
         }
         return false;
diff --git a/testable-core/src/main/java/com/alibaba/testable/core/model/LogLevel.java b/testable-core/src/main/java/com/alibaba/testable/core/model/LogLevel.java
index db8e962..9a3cfbc 100644
--- a/testable-core/src/main/java/com/alibaba/testable/core/model/LogLevel.java
+++ b/testable-core/src/main/java/com/alibaba/testable/core/model/LogLevel.java
@@ -3,22 +3,26 @@ package com.alibaba.testable.core.model;
 /**
  * @author flin
  */
-
 public enum LogLevel {
-
     /**
-     * Be quiet
+     * Mute
      */
-    DISABLE,
-
+    DISABLE(0),
     /**
-     * Print diagnose logs
+     * Warn only
      */
-    ENABLE,
-
+    DEFAULT(1),
     /**
-     * Print verbose log
+     * Show diagnose messages
      */
-    VERBOSE
+    ENABLE(2),
+    /**
+     * Show detail progress logs
+     */
+    VERBOSE(3);
 
+    public int level;
+    LogLevel(int level) {
+        this.level = level;
+    }
 }
diff --git a/testable-core/src/main/java/com/alibaba/testable/core/util/LogUtil.java b/testable-core/src/main/java/com/alibaba/testable/core/util/LogUtil.java
index 0e8b182..74aff4b 100644
--- a/testable-core/src/main/java/com/alibaba/testable/core/util/LogUtil.java
+++ b/testable-core/src/main/java/com/alibaba/testable/core/util/LogUtil.java
@@ -1,36 +1,14 @@
 package com.alibaba.testable.core.util;
 
+import com.alibaba.testable.core.model.LogLevel;
+
 /**
  * @author flin
  */
 public class LogUtil {
 
-    public enum LogLevel {
-        /**
-         * Mute
-         */
-        LEVEL_MUTE(0),
-        /**
-         * Warn only
-         */
-        LEVEL_WARN(1),
-        /**
-         * Show diagnose messages
-         */
-        LEVEL_DIAGNOSE(2),
-        /**
-         * Show detail progress logs
-         */
-        LEVEL_VERBOSE(3);
-
-        int level;
-        LogLevel(int l) {
-            level = l;
-        }
-    }
-
-    private static LogLevel defaultLogLevel = LogLevel.LEVEL_WARN;
-    private static LogLevel currentLogLevel = LogLevel.LEVEL_WARN;
+    private static LogLevel defaultLogLevel = LogLevel.DEFAULT;
+    private static LogLevel currentLogLevel = LogLevel.DEFAULT;
 
     public static void verbose(String msg, Object... args) {
         if (isVerboseEnabled()) {
@@ -39,13 +17,13 @@ public class LogUtil {
     }
 
     public static void diagnose(String msg, Object... args) {
-        if (currentLogLevel.level >= LogLevel.LEVEL_DIAGNOSE.level) {
+        if (currentLogLevel.level >= LogLevel.ENABLE.level) {
             System.out.println(String.format("[DIAGNOSE] " + msg, args));
         }
     }
 
     public static void warn(String msg, Object... args) {
-        if (currentLogLevel.level >= LogLevel.LEVEL_WARN.level) {
+        if (currentLogLevel.level >= LogLevel.DEFAULT.level) {
             System.err.println(String.format("[WARN] " + msg, args));
         }
     }
@@ -58,7 +36,7 @@ public class LogUtil {
      * a pre-check method for reduce verbose parameter calculation
      */
     public static boolean isVerboseEnabled() {
-        return currentLogLevel.level >= LogLevel.LEVEL_VERBOSE.level;
+        return currentLogLevel.level >= LogLevel.VERBOSE.level;
     }
 
     public static void setLevel(LogLevel level) {