In this paper, modal transform method for cooperation working is proposed. With this method, the work is simply described by modal mass and arbitral number and location of robots are able to be controlled by conventional hybrid controller. Furthermore, rotation by linear actuators, one of the most important propositions in this research, is considered. Position, angle, force and torque are transformed into generalized coordinate, modal space, and geometric relations and dynamics are described. Validity of the proposed method was confirmed by an experiment.