Abstract： The clinical performance can only be evaluated when it comes to the last step in the conventional way of prosthesis.However,it often causes the failure because of the unconformity between the expectation and final performance.Resulting from this kind of situation,quality control based on the predictable results has been suggested.It is a new idea based on the way of reverse thinking,and focuses on the need of patient and puts the final performance of the prosthesis to the first place.With the prosthodontically driyen prodedure,dentists can complete the unification with the expectation and the final performance.