PURPOSE: To apply power supply control to an equipment centralizingly by using a radio wave on which information for on/off switch driving and identification information for identifying whether an equipment is designated are superposed.

CONSTITUTION: A transmitter-receiver 24 decodes information superimposed on a radio wave S and outputs a decoding signal to an ID recognition circuit 26. When the decoded ID information is coincident with set ID information, the recognition circuit 26 outputs a decoded on/off control signal to a relay on/off memory circuit 27. The memory circuit 27 controls a drive circuit 28 so as to activate an on/off switch 31 when the on/off control signal is an ON signal and controls the drive circuit 28 so as to inactivate the on/off switch 31 when the on/off control signal is an OFF signal. Thus, remote supply control of commercial AC power supply to each equipment is attained.