A remote-control-signal conversion apparatus is disclosed. The remote-control-signal conversion apparatus receives a radio control signal from a remote controller, converts the radio control signal into an infrared control signal, and transmits the infrared control signal to an external device. When the apparatus identifies the external device, the apparatus transmits a plurality of infrared control signals to the external device. The apparatus identifies device identification information of the external device based on a response from the external device. The apparatus radio transmits the identified device identification information to the remote controller. The apparatus transmits the device identification information and a control code corresponding thereto as the infrared control signal received from the remote controller to the external device. The apparatus transmits the infrared control signal to the external device.