Objective To evaluate the effect of hip joint replacement. Methods Based on three famous assess standards of hip joint replacement, and web technology, the computer can collect and analysis the data of the patient. Results The results show that this system succeeds in estimating the effect of the false hip joint replacement. Conclusion Use the estimate system based on Internet , it can improve the quality and the speed of the estimation of post-operation of hip joint replacement. The estimating result can be used conveniently in the communications of doctors.