In terms of policy, the Ministry of Construction has prepared and issued a Guidelines for Green Ecological Residential Area Construction Elements and Technical, China Ecological Residential Technology Evaluation Manual, Environmental Impact Evaluation Law of the People's Republic of China and other documents; in practice, economically developed areas combined with their own characteristics have carried out green building applications, such as the construction of green ecological district Vanke Langrunyuan, etc. What is worth mentioning is the 2008 "Beijing Green Olympics" and the 2010 "Shanghai Eco Expo" made green building concept deeply rooted in people's hearts. Although green building has aroused widespread attention among all walks of life, after all green building is still in its initial stage, we need to standardize the evaluation criteria, do further research in order to make green building enter a substantive application stage. Therefore, this study uses multi-level gray evaluation method, qualitative and quantitative combining method to evaluate green building. On the basis of research on the evaluation methods for ecological residence in foreign countries, such as British BREEAM, U.S. LEED, multinational GBTOOL and Chinese ecological residence, we absorb the essence and abandon the defects for the establishment of a green building evaluation under ecological view. In this study, gray comprehensive evaluation indicator is used to evaluate the green performance of building, which can better identify and compare the effectiveness of green buildings, and allow easier promotion and application across the country.