In recent years, the energy consumption of China increases very fast and its utilizing efficiency is low, which is an issue standing out relatively, thus the prior law on energy conservation can not meet the requirement of the work on energy conservation nowadays. In order to promote the work on energy conservation in the whole society, the Standing Committee of National People's Congress enacted the amendment of the law this year. This article introduces the fundamental conceptions and main contents of the revised law, together with the initial effects after its implementation.