A value information management system includes, a value exchange card, user terminal, and management server. The value exchange card stores value information representing the value of a product/service purchased through a network, together with ID information. The user terminal includes a medium information reading unit which reads the information of the value exchange card and an information transmitting unit which transmits the information read by the medium information reading unit through the network. The management server includes an information storage management unit which receives the information transmitted from the user terminal and stores/manages ID information and value information in association with each other, and a value information search unit which searches for the value information corresponding to the ID information in response to an inquiry sent through the network and returns the value information. A value information management method is also disclosed.