To provide a network system which enables respective players to comfortably play a game without concentrating processing loads on a specified computer.

A game device 20 transmits request signals including area information indicating an area where the player is to play to a central management server 10. The central management server 10 decides whether or not an area server executing the game processing of the area indicated by the request signal already is present, and in the case that the area server corresponding to the area already is present, operates the game device 20 which is the transmission origin of the request signal as an area client operated under the control of the area server. On the other hand, in the case that the area server corresponding to the area is not present, the game device 20 is operated as an area server which executes the game processing of the area.