A dedicated wireless access point is not required, and an air-conditioning apparatus can be paired with a wireless access point simply by operating at hand an operating device that is separate from the air-conditioning apparatus. A remote control (15) is provided with a pairing request instruction button for instructing an air conditioner (12) to cause a first communicator serving as a wireless device of the air conditioner (12) to transmit pairing request data, and upon receiving, from the remote control (15), a signal indicating that the pairing request instruction button has been operated, the air conditioner (12) transmits pairing request data through the first communicator, completes a pairing upon receiving authentication data from a wireless AP (13), and connects to the wireless AP (13).