We have designed and investigated the system of upper limbs rehabilitation. The measurement parameters in the system are Electromyography (EMG), the angle of arm, and weight. These parameters are useful as an indication of rehabilitation performance in terms of both quantity and quality. The performance of the proposed system is evaluated with CPM training on triceps and infraspinatus muscles, which is important for patients with paralysis from stroke. Results show that the system can function correctly and their measuring parameters are appropriate for rehabilitation.