The cable force test is one of the important measurement items for bridge health monitoring. Designs and develops a wireless cable force measurement system based on the frequency method through the research of cable force testing technologies. Design a wireless MEMS capacitive accelerometer, describes the principles and discusses the layout of the measuring points and the new fundamental frequency algorithm in the cable force test. Also, based on the actual project, has a detailed description of the system use. Through cable force calculation algorithm argument, have dispatched a cable force of the measurement method to accurately calculate a more accurate, and verified through experiments. Provided an efficient, convenient and accurate cable force measurement system and method for bridge engineering had an important reference value for engineering staff.