To provide an electronic value information transaction system used for an electronic value information transaction performed between users who are members of an electronic value information transaction organization, which can easily repair transaction data when broken, and find out and correct an alternation even if the data is alternated.

The electronic value information transaction processing system 1 is connectable to two or more information processors 2, 3 and 4 through networks 4 and 5 to perform the electronic value information transaction using the information processors. This processing system 1 comprises a transaction arithmetic processing server 8 for performing transaction arithmetic processing, a first database 11 and second database 12 connected to the transaction arithmetic processing server 8 through a network. The first database 11 stores each electronic value information transaction, and the second database 12 stores electronic value information transaction data in a format differed from the data structure of the first database.