Shoulder pain is one of the life style disease, including shoulder impingement syndrome (SIS), which accounts for 44-65% of all complaints of shoulder pain. Through rehabilitations and wearing shoulder brace could improve SIS. The purpose of this study is to develop a wearable rehabilitation clothing system that can be integrated into the shoulder strap structure and fabric-based electrode for instantaneously quantifying the patient's muscle activities. By using Delsys system to compare the effectiveness. In the result shows that the accuracy of the study's system is 86%, which could also show the muscle strength during exercising.