The WABOT-2mkII is an anthropomorphic robot that can execute actual piano playing work, a piece of information processing work, completely using its autonomous functions. Each hand has 16 degrees of freedom (DOF) in total. To realize the integration of multiple DOF, the cable-conduit drive system is introduced. This study has the purpose of clarifying the motion relationship between the actuator and the joint, establishing a cable system motion control method, and applying it to WABOT-2mkII system. In this paper, the mechanism of WABOT-2mkII, the representation of a cable system by models, and the observations of the control method are discussed.