Multi-energy integration has put forward the new requirements for future market transactions within the energy industry. The blockchain can effectively support the innovative service pattern of new industries in the energy area as a new information technology. To extend the applications of multi-energy complementary control technology in the future

achieve the integration of multiple information resources and physical resources in the multi-energy system

and ensure the transaction information security in the integrated control process

this paper focuses on analyzing the applicability and the problem of data sharing in blockchain for multi-energy system

based on the transaction demand in the multi-energy system and current situation of the heterogeneous blockchain technique. The necessity and the method of constructing transaction system of multi-energy system based on heterogeneous blockchain technology are proposed. Finally

the key technologies of blockchain in the multi-energy system and the constraints on the follow-up business development are summarized. In addition

some technology schemes and relative suggestions are given to solve the problems of blockchain limitation and support the work of transaction between different heterogeneous blockchains in the future multi-energy system.