Abstract: After thirteen years of rapid development, the smart grid now has the characteristics of a typical cyber physical system (CPS). The continuous integration of cyber attributes and physical attributes has also greatly improved the safety, stability and intelligence of the smart grid. Energy Interconnection has the characteristics of multi-energy complementarity, interconnection of everything, interaction between virtual and real, and further introduces social attributes on the basis of smart grid cyber physical system, such as: Internet of Things, transactions, government, users and other unique influencing factors, these are not factors to avoid and not ignore. Therefore, this paper proposes to build a model based on the cyber physical social system (CPSS) for analysis and research. By abstracting the plants, stations, and transmission lines in the Energy Interconnection into a single network element, cyber attributes, physical attributes, and social attributes are used. Define these network elements and rebuild the network frame based on the system, analyze the flow characteristics of network information flow, energy flow and value flow macroscopically, study the interaction frequency of network elements and the coupling strength of attributes. The research ideas of the two dimensions of cyber and physical attributes are extended to the three dimensions of cyber, physical, and social attributes, to more comprehensively evaluate the comprehensive characteristics of the energy Interconnection, give a more intuitive display of the functional positioning of each network element, and discover the weak links and put forward optimization suggestions, which better solve the limitations of CPS analysis and research. This research direction is in line with the idea of building an international leading energy interconnection with Chinese characteristics. It is analyzed based on the three main attributes of cyber, physical, and social, and fully displays the multi-dimensional panorama of the energy interconnection.