PURPOSE: To eliminate the need for the adjustment between computers by utilizing one clock in common so as to obtain a time in order to synchronize the time between the computers on a local area network.

CONSTITUTION: The equipment consists of a time request section 10, a request reception section 20, a message control section 30, a request message transmission section 31, a reply message reception section 32, a reply message processing section 33, an end request section 34, a display section 35, a console 36, a clock calculation section 40, a time response section 50, a processing end section 60, communication sections 70, 71, a request message reception section 80, a message control section 90, a request message processing section 91, a reply message transmission section 92, an end request section 93, a time acquisition section 100, and a time generator 110. When the processing requiring the present time is caused, the same time is obtained for all computers on the network without adjustment between the computers by using one clock only.