Abstract: The span of the suspend-dome of the badminton arena for 2008 Olympic Games is 93m, and the average steel cost is optimized down to about 60 kg/m². The vibratory strain gauge and Total Station Instruments are used to monitor the force of the members and tension of cables. Displacement of joints are monitored during construction and the data shows that the force, displacement and cable tension are all with in reasonable range. With the cable tension as the main control parameter, the vertical displacement of joints as the second control parameter and the members' force being considered simultaneously, the cable tension reaches the design requirement.