首先，从全生命周期视角出发，对我国能耗增长的根源进行了剖析；其次，剖析了节能的基本概念和内涵，指出应重点区别建设型能耗和运行型能耗；最后，总结了中长期节能的战略目标，以及制度节能、系统节能、技术节能3类实现措施,并对系统节能开展了住宅寿命问题的案例分析。

The main reason of energy demand growth in China from the perspective of life cyce of society was analyzed. After that, the basic concept of energy saving for China was analyzed, and the importantce to distinguish the construction energy consumption and the operation energy consumption were pointed out. Then, the strategic goal of mid-long term energy saving of China, and three ways to implement it were proposed and they were: institutional energy saving, systematic energy saving and technological energy saving. And a case study of systematic energy saving for the problem of the life time of domestic building was also introduced.