Code management system

A code management system is provided for reducing an amount of data on a product identification number assigned to a product in traceability system and enabling to reduce an information management burden required for a history reference. In a weighing label attaching process, a main server distributes unused individual product code complying with a request from a weighing machine. The weighing machine creates and stores a weighing related information that relates a case code previously read to a weighing result (weight), a calculating result (price), a label code (a product identification information) determined as any of individual product codes, and a content of a label information. The main server requires the weighing related information to provide, complying with a request submitting the label code from a purchaser of the product. The weighing machine searches and transmits the weighing related information to the main server complying with the request from the main server.