To provide a method for automatically planning schedule management making it possible to automatically produce a schedule and recognize that a scheduled date is approaching and, even if the schedule is not observed, automatically change the entire unprocessed portion of the schedule.

The method includes the step of inputting a scheduled number of days as the number of days required for each kind of predetermined work, and storing it in a server computer 24; the step of inputting the expected start date of a work schedule and the kind of work from a responsible person's terminal and storing them in the server computer; the step of producing a schedule by adding the scheduled number of days to the expected start date of the work schedule according to the kind of work; and the step of providing the schedule onto a network.