Abstract: A control system including a plurality of machine units each implementing a role for a specific working, the system comprising independent operation control units which direct the machine units to perform independent operations, at least one concerted operation control unit which directs machine units to perform concerted-operations and control means which operates on machine units designated to perform a concerted operation to work under control of the concerted operation control unit and operates on said machine unit left aside from the concerted operation to work under control of the independent operation control units. The arrangement enables a plurality of machine units to have a concerted operation or quit a concerted operation, allowing a machine unit which is put aside from said concerted operation to implement independent operation, whereby a high-efficiency control system is realized.