The invention provides a method that enables loading/unloading a plurality of types of games as part of an application program, typically, a game application program installed on a smart card system with high ability of storing information for which highly-reliable security is achievable, extending the use range of the card. Of a program to run on the card, the processing parts that can be executed in common are packaged as modules and game definitions described in scripts are loaded/unloaded into/from the card as required from a terminal operating with the card. In the program, a script interpreter that interprets and executes scripts, a controller that controls scripts loading/unloading, a controller that performs the management of point data and rights to play game are prepared, whereby dynamic loading/unloading of types of games is possible and one application can offer a plurality of types of games that can be selectively executed.