The purpose of this study is to develop power assist device, which is easy to use like normal clothes and does not restrict movement, and portable air supply system. User can be assisted by wearing this one on which the pneumatic soft actuator, which has a high power weight ratio and a light weight, is put. The developed air supply system, which can retrieve compressed air from an actuator, is effective to decrease energy consumption. This air supply system is effective to downsize whole system. In this paper, outlines of the developed power assist wear without exoskeletons, and portable air supply system are described.