The purpose of the present invention is to provide a backup memory management system capable of indicating any misuse of data in a backup memory and imposing an appropriate sanction. The backup memory management device comprises a data saving system 10. When the generated and renewed parameter data is stored into the backup memory 3, the data saving system 10 determines whether or not parameter data already stored in the backup memory 3 is proper data, and if the parameter data is determined as proper data, the generated and renewed parameter data is written over the parameter data saved in the backup memory 3, and if the parameter data is determined as improper data, executes predetermined special processing. Special processing means processing such as imposing a penalty in the course of a game.