PURPOSE: To execute highly efficient process management without requiring independently executing working process management by collectively executing work advancement management and practical work, i.e., work to be executed on a work environment formed from a working menu.

CONSTITUTION: A process management control part 6 executes the register of work in a working menu and the setting and change of a working process. A menu display/execution control part 7 displays the working process by lines whose directions uniformly defined and nodes indicating work. A work environment preparation control part 12 prepares a work environment in a computer in accordance with start specification to a node indicating each work. A working procedure indicating the preparation of a node corresponding to each work and the flow of the work executes the registration of the work and the setting/ change of the working process based upon the formation of a line whose direction is uniformly defined. Since a work environment for a node corresponding to each work on the working menu is prepared by start specification from a user, it is unnecessary to independently execute the management of working processes and the preparation of work environments.