Abstract：
This paper used Renmin village residential building in the Yuzhong district of Chongqing as the research object, to combine both of the status of the existing building structure and the level of energy-saving technology available in Chongqing, the scheme of energy-efficient technical renovation was proposed and analyzed using energy analysis software. The results showed that the energy-efficient renovation of existing buildings not only reach energy efficiency design standards requirements but also improve the indoor thermal environment. Inner surface temperature on roof can be reduced 1~2℃ in the summer and the comfortable hours of indoor temperature naturally can be increased more than 50% in the winter.
