Abstract: A delivery system includes: a management server configured to acquire and accumulate order information of an order made from a user terminal of one user within a set time, the order information including store information, product information, delivery destination information, and delivery time information, transmit the order information to a delivery person terminal of one delivery person, transmit the product information and the delivery time information to a store terminal of a store, and allow the user to order the products in plural stores in the order each time, generate the order information for the order in each time, and when it is determined that the orders of the one user are made across plural stores, generate pickup sequence information determining a sequence in which the one delivery person is to receive the products in the stores, and further transmit the pickup sequence information to the delivery person terminal.