The selfconfidence of China’s ecological civilization system has the fundamental basis of the advantages of the socialist system with Chinese characteristics, the realistic basis for fully demonstrating the efficiency of the ecological civilization system, the historical basis for the longterm exploration from the environmental protection system to the ecological civilization system, and the value basis for the profound people nature of the ecological civilization system. The selfconfidence of ecological civilization system is conducive to the further development of social resources of selfconfidence of socialist system with Chinese characteristics, the cohesion of spiritual consensus towards a new era of socialist ecological civilization, and the enhancement of China’s national heritage of taking responsibility for global ecological governance. In order to further consolidate and enhance the institutional selfconfidence of China’s ecological civilization in the new era, efforts must be made to adhere to and improve the system of ecological civilization, fully learn from the experience of foreign ecological environment system construction, and constantly enhance the discourse power of ecological civilization system.