The implementation effect of green buildings depended on the designer's understanding and implementation of the relevant evaluation standards. 87 evaluation terms involved in the design stage of green buildings were studied through analyzing the formulation characteristics of new Assessment Standard for Green Building. Its classified statistics was conducted according to different professional and technical measures, on which scores of different professional and technical measures were calculated. The characteristics and highlights of green building design were analyzed based on the data. Combining with the distribution of over 100 filings in different design stages involving in 8 design professions during architectural design, the design tasks and working focus of the designers in different design stages during the design process of green buildings were summarized, and the design principles and countermeasures of green buildings were put forward.