Abstract:Combining with blockchain technology, this paper presents the framework of weak-centralized energy trading system, and explores the energy trading system in the future energy internet under the condition of complex interaction of energy and in-formation between power supply, power grid and load. This paper analyzes the various energy solutions for the energy internet when the benign and effective interaction happens between power supply and power grid. Since blockchain owns the charac-teristics of trusted transactions, high stability and robustness, smart contract, distributed decision-making and wide-area inte-gration, it is inherently consistent with the energy trading system for energy internet. Furthermore, by exploring the technical details of blockchain, we analyze the coupling factors of energy internet and blockchain technology, and identify its position in energy internet, and propose a weak-centralized energy trading system. Finally, we analyzes the technical difficulties faced by the trading framework.