A delivery system comprising: a delivery vehicle configured to carry a delivery box to be delivered to a delivery destination; and a carrier vehicle configured to carry the delivery vehicle thereon, characterized in that the carrier vehicle includes: an automated warehouse configured to store a plurality of delivery boxes and change locations of the plurality of delivery boxes; and a controller configured to control the automated warehouse such that the delivery box to be delivered to the delivery destination is located at a receipt location within the carrier vehicle at which the delivery vehicle can receive the delivery box by the time the delivery vehicle gets out of the carrier vehicle at a relay point on a delivery route from a shipping place to the delivery destination, and upon receiving the delivery box located at the receipt location, the delivery vehicle carries the delivery box to be delivered to the delivery destination thereon; the delivery vehicle gets out of the carrier vehicle when the carrier vehicle arrives at the relay point for the delivery destination; and the delivery vehicle travels on the delivery route from the relay point to the delivery destination to deliver the delivery box to the delivery destination. a delivery vehicle configured to carry a delivery box to be delivered to a delivery destination; and a carrier vehicle configured to carry the delivery vehicle thereon, characterized in that the carrier vehicle includes: an automated warehouse configured to store a plurality of delivery boxes and change locations of the plurality of delivery boxes; and a controller configured to control the automated warehouse such that the delivery box to be delivered to the delivery destination is located at a receipt location within the carrier vehicle at which the delivery vehicle can receive the delivery box by the time the delivery vehicle gets out of the carrier vehicle at a relay point on a delivery route from a shipping place to the delivery destination, and upon receiving the delivery box located at the receipt location, the delivery vehicle carries the delivery box to be delivered to the delivery destination thereon; the delivery vehicle gets out of the carrier vehicle when the carrier vehicle arrives at the relay point for the delivery destination; and the delivery vehicle travels on the delivery route from the relay point to the delivery destination to deliver the delivery box to the delivery destination. an automated warehouse configured to store a plurality of delivery boxes and change locations of the plurality of delivery boxes; and a controller configured to control the automated warehouse such that the delivery box to be delivered to the delivery destination is located at a receipt location within the carrier vehicle at which the delivery vehicle can receive the delivery box by the time the delivery vehicle gets out of the carrier vehicle at a relay point on a delivery route from a shipping place to the delivery destination, and upon receiving the delivery box located at the receipt location, the delivery vehicle carries the delivery box to be delivered to the delivery destination thereon; the delivery vehicle gets out of the carrier vehicle when the carrier vehicle arrives at the relay point for the delivery destination; and the delivery vehicle travels on the delivery route from the relay point to the delivery destination to deliver the delivery box to the delivery destination.