PURPOSE: To effect the remote control of a power supply for a driven device surely by a method wherein the power supply is turned on by a driving device while a remote control means is sending out a starting signal consisting of a pulse train but the power supply is intercepted when the starting signal is stopped.

CONSTITUTION: A remote control device 10 sends out a starting signal S consisting of an unipolar pulse. The signal S is converted in a device 21 into bipolar pulse through a breaker 20, the bipolar pulse is differentiated in a device 22 to effect the full-wave rectification of an output N in a device 23 and a signal F, having a given level, is obtained by a LPF 24. The signal F is compared with a threshold value V1 in a driving circuit 25. When F>V1, a throwing signal E is outputted to energize a relay 3c, close contacts 51, 52 and rotate the motor 1 of a driven device through a driving device 2. When the output of the signal S is stopped to stop the motor 1, the differentiated output H is reduced, the output F of the LPF 24 is also reduced and an intercepting signal G is outputted to deenergize the relay 3c and open the contacts 31, 32 when F<V1. According to this method, the remote control of the power supply of the driven device can surely be effected.