The relationship between energy utilization and environmental protection and energy security are key issues that can not be ignored in the process of economic development. Energy Internet provides a good platform and technical support to solve these problems, which helps to reduce carbon dioxide emissions, promote peak carbon dioxide emissions, and improve national energy security. Based on the background of environmental problems and energy security, this paper systematically introduces the purpose of building Energy Internet, the characteristics of energy Internet and the specific implementation methods. It puts forward three levels solution schemes of energy structure transformation, interval energy flow model construction and regional energy efficient utilization. Finally, the role of marketization in the process of Energy Internet construction is discussed, and the potential research is prospected.