To provide a graded charging service system of WEB contents capable of realizing the addition of game contents satisfying both of a general group and a maniac group respectively by adding the menu of a game mode and an option function, etc., on a game machine and adding a linking function on the side of the WEB contents as well matched with a utilization charge by having a user select a service that he/she wants to utilize on the WEB contents and pay the utilization charge corresponding to it.

The WEB contents linked with a game are browsed by accessing a server unit 30 by a personal computer 60 or a portable information terminal 40, and a function is added to the game machine by paying a charge set for the function to be added. A race game case body 1 checks charging information, and in the case that an adding function is ON, the function is added to mode selection or navigation assist during the game or the like is made possible.