The study is to design a wearable interactive music system, expecting to expand the scope of application of wearable devices for music performance. Object-oriented program Max/MSP was used as a development environment to build up system operation structure, user’s interface, and sound mapping design. The explanation of study framework of each chapter is as below: Chapter One: general background information, briefly introducing the wearable device function and development; Chapter Two: literature review, collecting information on recent works of wearable interactive music performances; Chapter Three: system design, illustrating system structure and signal process; Chapter Four: system implementation, illustrating operating system and user’s operating interface design: Chapter Five: Opinion Poll, proceeding questionnaire assessment on music technology related background users; Chapter Six: conclusion, displaying the outcome and bringing up the improved direction in future.