Parameters relating to wireless communication in a wireless network system are set in a printer, which is to be wirelessly connected to the network system anew, from a personal computer that is already wirelessly connected, and the personal computer acquires identification information of the printer and transmits this identification information to an access point. The access point sets up the connection to the printer based upon the identification information that has been transmitted from the personal computer. This makes it possible to connect a new wireless communication apparatus to a wireless network system through a simple set-up operation.