diff --git a/server.py b/server.py
index 91d1548..0ecf660 100755
--- a/server.py
+++ b/server.py
@@ -18,16 +18,16 @@ parser = argparse.ArgumentParser()
 
 def parse_args():
     parser = argparse.ArgumentParser()
-    parser.add_argument("-f", "--config", help="config file", type=argparse.FileType('r'))
-    parser.add_argument("-c", "--charge-control", help="enable charge control", const="charge_config.json", nargs='?')
-    parser.add_argument("-d", "--debug", help="enable debug", const=10, default=20, nargs='?')
-    parser.add_argument("-l", "--listen", help="change server listen address", default="127.0.0.1")
-    parser.add_argument("-p", "--port", help="change server listen address", default="5000")
-    parser.add_argument("-r", "--record-position", help="save vehicle position to db", action='store_true')
-    parser.add_argument("-m", "--mail", help="change the email address")
-    parser.add_argument("-P", "--password", help="change the password")
+    parser.add_argument("-f", "--config", help="config file, default file: config.json", type=argparse.FileType('r'))
+    parser.add_argument("-c", "--charge-control", help="enable charge control, default charge_config.json", const="charge_config.json", nargs='?', metavar='charge config file')
+    parser.add_argument("-d", "--debug", help="enable debug", const=10, default=20, nargs='?', metavar='Debug level number')
+    parser.add_argument("-l", "--listen", help="change server listen address", default="127.0.0.1", metavar="IP")
+    parser.add_argument("-p", "--port", help="change server listen port", default="5000")
+    parser.add_argument("-r", "--record", help="save vehicle data to db", action='store_true')
+    parser.add_argument("-m", "--mail", help="set the email address")
+    parser.add_argument("-P", "--password", help="set the password")
     parser.add_argument("--remote-disable", help="disable remote control")
-    parser.add_argument("-b", "--base-path", help="base path for app",default="/")
+    parser.add_argument("-b", "--base-path", help="base path for web app",default="/")
     parser.parse_args()
     return parser