According to the present disclosure, a wireless base station device delivers, to a wireless terminal device, an optical ID having a simple configuration in accordance with a pre-stored optical ID correspondence list; and the wireless terminal device selects connection authentication information corresponding to the received optical ID from a pre-stored optical ID correspondence list, and transmits predetermined authentication information to the wireless base station device through a predetermined connection method by RF wireless. Upon confirming that the received authentication information matches authentication information corresponding to an optical ID in the optical ID correspondence list, the wireless base station device permits information communication between the wireless terminal device and a higher-level network.