Building energy consumption is one of the largest side of the energy industry, it owns a large weight proportion on energy and the environment influence. (Building energy consumption in our country in 2009 has taken the proportion of one-time energy consumption about 27%, which is expected to increase to 30% in 2020.) The application of solar energy in the construction industry will have a lot of positive role in building energy consumption, building "low carbon", environmental protection, solving the energy crisis, improving the residential environment. This paper made analysis with specific cases to analyze the economic and environmental benefits that brought by the present research findings on solar energy, aiming at providing specific evaluation method for solar energy application in building energy efficiency, and offering the reference to the research on the development of energy-saving building.