Operation information for distinguishing each operation of a wireless signal transmitter of a remote control system is included in a wireless signal of the wireless signal transmitter, the operation information is memorized in an AV apparatus which is designated by the wireless signal transmitter, and the wireless signal or only one of plural message frames which have the same information as the wireless signal and are transferred from other AV apparatus connected to a common communi­cation line is selected by comparing the operation information of the message frame with the memorized message frame in the AV apparatus.