The current situation and problems of smart energy system and architecture design are briefly introduced. Smart energy service system based on industrial internet is proposed, realizing functions such as wide access of multiple devices, monitoring and control, orderly charging of electric vehicles, and management of energy storage device charging and discharging. Firstly, the overall architecture of smart energy service system is constructed based on internet & ubiquitous internet of things. In the second, it focuses on expounding the technical architecture and integration architecture. Finally, the demonstration applications are introduced. The system has been deployed in the headquarters of state grid, interconnecting with the marketing business system, intelligent internet of vehicles platform and other systems, which realizes data sharing and resource sharing. On the basis of the platform, the applications of electric vehicles and energy storage orderly charging and discharging are built. The system has been deployed in Beijing, Shanghai, Henan and other places, and it is verified the practicability and effectiveness. This work is supported by Science and Technology Project of State Grid Corporation of China (No. 52020118007D) and Science and Technology Project of State Grid Electric Power Research Institute Ltd.