An electronic device connected to at least one external electronic device, the electronic device including a communication unit configured to perform data communication with the at least one external electronic device, an interface unit configured to connect to a sound output device, and a controller configured to receive audio data when the sound output device is connected to the electronic device through the interface unit, the audio data associated with a first external electronic device outputting a second content associated with a first content being output through the electronic device from the first external electronic device, and to output the received audio data through the sound output device.