To provide a system capable of registering users to key managing units and of browsing use histories recorded in the key managing units, which can be performed even from a terminal unit on its network.

A key managing unit server 2 is capable of permitting the communication with each of a key managing unit 4, a terminal unit 5 for officer, or a general terminal unit 6 in each store connected to a LAN 3 by means of a communication network 1. Through the key managing unit server 2, the browsing of users' registration and use histories by using the key managing unit 4 can be performed on the terminal unit 5 for officer and also on the general terminal unit 6 approved by the key managing unit server 2.