Targeting to feedback implementation effect of standards and analysing the factors affecting the implementation effect from the perspectives of technical indicators, implementation status and implementation benefits, an evaluation model was established based on the fuzzy analytic hierarchy process. The model consisted of thirty-one evaluation indexes. Empirical research was conducted on the standard “Minimum allowable values of the energy efficiency and energy efficiency grades for room air conditioners” (GB 21455-2019). For the first time, a comprehensive method system for evaluating the implementation effect of energy efficiency and water efficiency was established, which explored the theoretical basis for assessing the implementation effects of the energy and water efficiency standards, and would guide the revision, publicity and supervision of them.