An object of the present invention is to provide an order placement and acceptance management system and an order placement and acceptance management method, which is flexible and user-friendly for an order acceptant's side.The present invention comprises an order database for entirely storing the order data of an orderer in increments of order, demand processing means for receiving the attribution of the order data that is designated by the orderer via a network, retrieving means for receiving the foregoing attribution from the foregoing demand processing means and retrieving a subset of the order data having the foregoing attribution from the foregoing order database, transmission means for transmitting the subset of the foregoing retrieved order data to an order acceptant system via the network and progress managing means for managing the progress of the order in increments of order.
