Value data management method, value data management system, and miles management method

摘要

There is provided a value data management method for managing a first value data acquired by each of users and having value exchangeable for specific merchandise, comprising: reading second value data from a first information storage medium and user identification data from a second information storage medium; and updating the first value data acquired by the user corresponding to the user identification data read from the second information storage medium, based on the second value data read from the first information storage medium.