Abstract: An optical signal remote controller with narrowed acting angle having an optical signal emitter and a light guiding element used to narrow the acting angle of the optical signal emitted by the optical signal emitter is provided. The remote controller further includes a modulating apparatus, which move the light guiding element between a wide angle position and a narrow angle position to selectively narrow the acting angle. In the embodiments, a laser position indicator is also provided to indicate the targeting direction of acting angle.