To provide technology for restricting log-on and access for a plurality of client computers and a plurality of users, which solves the conventional problem that useless DB access frequently occurs when a plurality of users share a computer.

At start-up, a computer downloads user master information related with the right of each user, terminal master information related with the right of each computer, and right master information related with the right of each combination of a user group and a terminal group from a server device, and specifies an application which can be executed (used) by a user by the computer using each master information.