An unmanned delivery system includes a merchandise collection point, vehicle waiting areas, a management center that manages the inventory status of individual pieces of goods in the merchandise collection points and the status of unmanned delivery vehicles at the vehicle waiting areas. A network connects the collection point, the vehicle waiting area, and the management center. The management center selects, based on product order information, the collection point and the vehicle waiting area in accordance with the inventory status of the ordered item and the location of the delivery address, selects an unmanned delivery vehicle, and transmits product delivery information to the unmanned delivery vehicle and the merchandise collection point. The unmanned delivery vehicle autonomously travels to the selected collection point, automatically delivers the ordered item to the delivery address, and autonomously travels to the vehicle waiting area after the settlement and the delivery are made.