A remote control device is disclosed. A remote control device for controlling an external device comprises: a communication interface for allowing communication with an external device; an energy harvester for acquiring the electric energy; a power unit for receiving the supply of the electric energy from the energy harvester; and a processor which controls the communication interface to release a communication connection established in order to communicate with the external device if the supplied voltage of the power unit is greater than or equal to a first threshold value but less than a second threshold value, and which provides, to the power unit, the electric energy acquired by means of the energy harvester.