diff --git a/scripts/lib.sh b/scripts/lib.sh
index 81a7b3846..63f10ff77 100755
--- a/scripts/lib.sh
+++ b/scripts/lib.sh
@@ -276,6 +276,7 @@ else
 fi
 
 
+# system judge
 if [ "$OSNAME" == "macos" ]; then
     brew install libmemcached
     brew install curl
@@ -349,6 +350,7 @@ else
     fi
 fi
 
+##### common start #####
 
 Install_Libiconv
 
@@ -362,3 +364,5 @@ Install_Freetype_New
 # Install_OpenSSL
 Install_Libzip
 
+##### common end #####
+