The energy conservation work in our country construction is in a new stage, but the study of it is quite behind. So it is necessary to make the building energy efficiency standards play a good role in the construction and strengthen the analysis of energy efficiency building evaluation system research. This paper is from the perspective of building energy efficiency. Firstly, the evaluation index system of rural building energy conservation is established, and then the evaluation index is scored by experts. Next, the fuzzy comprehensive evaluation method is used to evaluate the rural residential energy conservation and get the evaluation grade. Finally, the index system of rural energy saving buildings is predicted systematically with set pair potential, which provides reference for the evaluation and development trend of building energy saving.