A delivery system comprises a delivery vehicle configured to carry a delivery box to be delivered to a delivery destination thereon; and a carrier vehicle configured to carry the delivery vehicle thereon. The carrier vehicle performs exit control to get the delivery car carrying the delivery box to be delivered to the delivery destination out of the carrier vehicle at a relay point on a traveling route to the delivery destination, and the delivery vehicle performs traveling control on the traveling route from the relay point to the delivery destination, and fixes the delivery box to a delivery box fixture located at the delivery destination.