Objective In order to meet the quantitative soft tissues balance measurement requirement in the TKR, a newsoft tissues balance measurement method and system have been developed to help surgeons measure and adjust thesoft tissue in the total knee replacement. Methods Six precise load sensors have been embedded in the measuredevice front, which will be inserted into the cutting gap of the knee joint, to measure the force of the surrounding softtissue. The pressures of these sensors represent the force of the posterior, middle, and anterior positions in the medial/lateral part of the knee joint gap. Furthermore, the device has the function that can change the distance between its upperand lower plate by the mechanical structure for adjusting the space in the knee joint. Results The preliminary testshows that the measurement system can accomplish the force measurement and the distance adjustment in the kneejoint, and display the data of the force distribution in three-dimensional manner in real-time. Conclusion It will be morehelpful for knee dynamics research to combine the data of soft tissue force with the data of distance between the knee joint.