Abstract: A coordinating information providing system and a read information management system provide system to select a commodity to purchase. The coordinating information providing system includes a purchaser terminal structure, a management server that manages information of a commodity as well as information of a purchaser and an information provider and that provides the purchaser terminal with the information of the commodity, an information provider terminal operated by an information provider who provides the management server with coordinates information of a commodity, an information management administrator terminal operated by an information management administrator who administrates the management server, and a network system with interconnecting the terminals and the server allows them to communicate interlinked.