Post-implementation assessment of legislation is not only a new system design of the Legislation Law，but also the meaning of improving the quality of legislation in the new era. Especially with the legislative power of the district-divided cities，how to conduct post-legislative evaluation has become a major theoretical and practical issue. The methodology of post-legislative assessment is often related to the legislative path and the specific methods guided by the path. That is to say，the choice of the path of value judgment or fact judgment of post-legislation assessment determines the balance application of evaluation method fundamentally. However，the choice of a single path can not fundamentally solve the problem of post-legislation evaluation，so the comprehensive post-legislative assessment which incorporates theoretical analysis and empirical analysis has become the proper path choice. Therefore，it is necessary to reconstruct the method system from legitimacy evaluation，rationality evaluation，normative（technical）evaluation，operability evaluation to effectiveness evaluation under the comprehensive path selection.