A motion sensor trigger system includes: a motion detector with a motion sensor that can be a passive infrared sensor; an external system; a trigger device including a trigger assembly, which includes a trigger body, a trigger transmitter assembly, at least one connector patch; and a control unit; and a remote control device; such that the trigger transmitter assembly emits a moving trigger signal that can be a moving thermal signal, which activates the motion detector. Also disclosed is a method of motion sensor activation, including positioning trigger device, sending moving trigger signal, activating motion detector, and activating external system.