PURPOSE: To easily set the operational schedule of plural computer systems from a centralized controller without any error in a batch, as for the schedule management system of a composite system by which the plural computer systems are centralized-controlled by the centralized controller.

CONSTITUTION: A daily operational pattern table 10 equipped with the plural pairs of operational pattern files in which the operational schedule of each computer system for one day is described, and a schedule management table 20 equipped with a schedule calendar for each computer system, are prepared in a centralized controller 4. The desired operational pattern file is designated and read out from the daily operational pattern table, and the operational schedule in the operational pattern file is transferred to, and written in a schedule memory area 22 at the position of the designated operational date of the schedule calendar in the schedule management table.