To perform the operation control of a peripheral device without having a conventional complicated command table and to reduce a processing burden on a main control means.

A main control part (not shown in the figure) for performing the operation control of the whole game machine transmits only one command showing a big winning state or a failure state to a CPU on the peripheral device (not shown in the figure) (a figure 10 (a)). Then, this CPU performs the operation control of the peripheral device in accordance with a game state shown by a receiving command with the reception of the command as a turning point (a figure 10 (b)). Thus, it is possible to perform the operation control of the peripheral device by reducing a data capacity to be used for controlling the game machine without having a conventional complicated command table and to reduce the processing burden on the main control means.