Disclosed are a dart game apparatus and a dart game system including an image projector according to exemplary embodiments of the present disclosure. The dart game apparatus and the dart game system including the image projector may include: a sensing unit sensing hitting of a thrown dart pin; a dart target allowing the dart pin to be received; a display area formed to surround an exterior of the dart target, provided in a body structure of the dart game apparatus, and receiving an image projected from an image projector to output a variable screen; an image projector projecting the image toward the display area; and a controller controlling operations of the dart game apparatus.