The present disclosure relates to a dart game device interworking with at least one external device. The dart game device includes a dart target having a plurality of point regions, a sensing unit configured to sense a hit to the dart target by a dart, a light source unit configured to output light in a light pattern, a sound source unit configured to output sound in a sound pattern, and a communication unit configured to communicate with the external device and control the external device to output light in the light pattern or to output sound in the sound pattern. The light and sound patterns depend on an occurrence of an event.