A display device is disclosed. The display device comprises: a signal reception unit; a communication unit for communicating with a remote control device; a storage unit for storing sound data; a speaker; and a processor for playing a sound and outputting the same through the speaker when a specific remote control signal transmitted from the remote control device is received through the signal reception unit, wherein the processor receives, from the remote control device and through the communication unit, recording data in which the point in time, at which the sound is received by the remote control device, is recorded, thereby enabling the distance between the display device and the remote control device to be calculated on the basis of the recording data.