The invention discloses a transportation system of an unmanned restaurant. The transportation system comprises a track device, a track changing device, multiple dining cars and a recovery device, wherein the track device comprises a conveying track and an external track, the track changing device comprises a track changing bracket, a first track, a second track, a track changing seat and a track changing moving mechanism, each dining car comprises a car frame, a placement frame, a driving mechanism, multiple pulleys and a dining car material pushing mechanism, the recovery device comprises a recovery car, and the recovery car comprises a car frame, a recovery bucket, a lifting mechanism and multiple pulleys. The transportation system of the unmanned restaurant has the advantages that the unmanned service and self-service of restaurants are achieved, and the purpose of reducing time and manpower is achieved.