When a received remote control signal does not satisfy any one of a plurality of conditions for a qualified remote control signal stored in a signal condition storage part, an electric device determines that the remote control signal is not a qualified remote control signal, and when the received remote control signal satisfies any one of the conditions, stores the remote control signal as a qualified remote control signal in a signal storage part. Next, when the received remote control signal matches the qualified remote control signal stored in the signal storage part, control is performed such that the electric device performs a predetermined operation. The conditions for the qualified remote control signal include, for example, that a pulse count is within a range of a predetermined number, and that a pulse width is within a range of a predetermined length.