A device and method for transmitting/receiving video data is disclosed. A sink device configured to receive video data from a source device includes communication circuitry configured to communicate with the source device; and a controller configured to transmit a probe request frame for detecting the source device, to receive a probe response frame from the source device receiving the probe request frame via the communication circuitry, and to obtain information regarding at least one external input source of the source device from the probe response frame.