The district heat-electric system（DHES） has the characteristic of multi-energy flow coupling and multi-agent operation

which challenges the mode of centralized energy management. To realize decentralized energy management

this paper abstracted the physical model of DHES into its object-oriented model firstly

realized the standardized representation of multi-energy flow optimization problem

and established the convex optimization model of typical electrical

thermal and thermoelectric coupling devices under the framework of the object-oriented model. Next

the alternating direction method of multipliers was used to decompose the centralized optimal heat and power flow problem into a decentralized optimization algorithm. Then

the concept of cyber-physical module（CPM） which has the decentralized decision-making ability was proposed

and energy management was realized through the cooperation of energy

message and value flow among CPMs. Simulation cases show that this method can make full use of the flexibility of complementation between heat and power

and realize economic operation of the system. Meanwhile

the method has good real-time performance and scalability

and has self-healing ability for temporary node communication failure.