Green building is the integration and combination of multiple construction techniques based on the idea of green building. The practice of green building should take root in the combination of multiple subjects. Based on the direction of undergraduate teaching of “Integration of Solar Energy and Building”, which is firstly piloted by Shandong Jianzhu University（SDJZU）. This paper discusses the idea and methodology of infusing theory and technology of green building into architectural design. With the analysis of the designs by undergraduates from SDJZU which won prizes on 2009 Taida Int’l Solar Power Construction Design Contest, it also summarized the vital significance of multi-disciplinary integration to the establishment of the idea and improvement of design methodology in green building design.