China and Japan have strong complementarity in the field of energy conservation and environmental protection. The most representative mechanism of cooperation between the two countries is “Sino-Japanese Energy Conservation Forum”，which began in 2006 and now is the largest platform for both countries to cooperate energy conservation. The forum has become an integration mechanism for energy conservation policy understanding，local government exchanges，academic and research institutions and enterprises cooperation. It realized a change to comprehensive multi-level cooperation on energy conservation，enhanced the understanding and mutual trust of cooperation on energy conservation，and established a good cooperation mechanism and the docking channels between China and Japan.