diff --git a/include/chsrc.h b/include/chsrc.h
index e651db8..dbe6906 100644
--- a/include/chsrc.h
+++ b/include/chsrc.h
@@ -15,6 +15,11 @@
 
 #define App_Name "chsrc"
 
+#define Exit_UserCause    1
+#define Exit_Unsupported  2
+#define Exit_MatinerIssue 3
+#define Exit_FatalError   4
+
 #define chsrc_log(str)   xy_log(App_Name,str)
 #define chsrc_succ(str)  xy_succ(App_Name,str)
 #define chsrc_info(str)  xy_info(App_Name,str)
@@ -114,7 +119,7 @@ chsrc_ensure_program (char *prog_name)
   else
     {
       chsrc_error (xy_strjoin (3, "未找到 ", prog_name, " 命令，请检查是否存在"));
-      exit (1);
+      exit (Exit_UserCause);
     }
 }
 
@@ -148,13 +153,13 @@ query_mirror_exist (SourceInfo *sources, size_t size, char *target, char *input)
   if (is_url (input))
     {
       chsrc_error ("暂不支持对该软件使用用户自定义源，请联系开发者询问原因或请求支持");
-      exit (1);
+      exit (Exit_Unsupported);
     }
 
   if (0==size || 1==size)
     {
       chsrc_error (xy_strjoin (3, "当前 ", target, " 无任何可用源，请联系维护者"));
-      exit (1);
+      exit (Exit_MatinerIssue);
     }
 
   if (2==size)
@@ -192,7 +197,7 @@ query_mirror_exist (SourceInfo *sources, size_t size, char *target, char *input)
     {
       chsrc_error (xy_strjoin (3, "镜像站 ", input, " 不存在"));
       chsrc_error (xy_2strjoin ("查看可使用源，请使用 chsrc list ", target));
-      exit (1);
+      exit (Exit_UserCause);
     }
   return idx;
 }
@@ -312,7 +317,7 @@ auto_select_ (SourceInfo *sources, size_t size, const char *target)
   if (0==size || 1==size)
     {
       chsrc_error (xy_strjoin (3, "当前 ", target, " 无任何可用源，请联系维护者: chsrc issue"));
-      exit (1);
+      exit (Exit_MatinerIssue);
     }
 
   bool onlyone = false;
@@ -323,7 +328,7 @@ auto_select_ (SourceInfo *sources, size_t size, const char *target)
   if (!exist_curl)
     {
       chsrc_error ("没有curl命令，无法测速");
-      exit (1);
+      exit (Exit_UserCause);
     }
 
   double speeds[size];
@@ -428,12 +433,12 @@ chsrc_confirm_selection (SourceInfo *source)
   if (source_is_upstream (source) && source_has_empty_url (source))
     {
       chsrc_error ("暂未对该软件实现重置");
-      exit (2);
+      exit (Exit_Unsupported);
     }
   else if (source_has_empty_url (source))
     {
       chsrc_error ("该源URL不存在，请向开发团队提交bug");
-      exit (2);
+      exit (Exit_FatalError);
     }
   else
     {
@@ -564,7 +569,7 @@ chsrc_ensure_root ()
     }
 not_root:
   chsrc_error ("请在命令前使用 sudo 或切换为root用户来保证必要的权限");
-  exit (1);
+  exit (Exit_UserCause);
 }
 
 
diff --git a/src/chsrc.c b/src/chsrc.c
index 400fce9..8c31f93 100644
--- a/src/chsrc.c
+++ b/src/chsrc.c
@@ -5,7 +5,7 @@
  * Authors       : Aoran Zeng <ccmywish@qq.com>
  *               | Heng Guo   <2085471348@qq.com>
  * Created on    : <2023-08-28>
- * Last modified : Same With Chsrc_Version
+ * Last modified : <2024-06-14>
  *
  * chsrc: Change Source —— 全平台通用命令行换源工具
  * ------------------------------------------------------------*/
@@ -112,7 +112,7 @@ pl_python_check_cmd (char **prog, bool *pdm_exist)
       else
         {
           chsrc_error ("未找到 Python 相关命令，请检查是否存在");
-          exit (1);
+          exit (Exit_UserCause);
         }
     }
 
@@ -194,7 +194,7 @@ pl_nodejs_check_cmd (bool *npm_exist, bool *yarn_exist, bool *pnpm_exist)
   if (!*npm_exist && !*yarn_exist && !*pnpm_exist)
     {
       chsrc_error ("未找到 npm 或 yarn 或 pnpm 命令，请检查是否存在其一");
-      exit (1);
+      exit (Exit_UserCause);
     }
 }
 
@@ -387,7 +387,7 @@ pl_go_check_cmd ()
   if (!exist)
     {
       chsrc_error ("未找到 go 相关命令，请检查是否存在");
-      exit (1);
+      exit (Exit_UserCause);
     }
 }
 
@@ -476,7 +476,7 @@ pl_java_check_cmd (bool *maven_exist, bool *gradle_exist)
   if (! *maven_exist && ! *gradle_exist)
     {
       chsrc_error ("maven 与 gradle 命令均未找到，请检查是否存在其一");
-      exit (1);
+      exit (Exit_UserCause);
     }
 }
 
@@ -882,7 +882,7 @@ ensure_apt_sourcelist (int debian_type)
       else
         {
           chsrc_error ("您的Debian版本过低(<10)，暂不支持换源");
-          exit (2);
+          exit (Exit_Unsupported);
         }
     }
 
@@ -2239,7 +2239,7 @@ wr_anaconda_setsrc (char *option)
       if (!exist)
         {
           chsrc_error ("未找到 conda 命令，请检查是否存在");
-          exit (1);
+          exit (Exit_UserCause);
         }
       chsrc_run ("conda config --set show_channel_urls yes");
     }