Abstract: Thermal network is an important component of multi-energy system. There are significant differences in modeling methods between electric network and heating network. It is difficult to directly apply traditional power system transients simulation program to modeling of multi-energy system. With the help of electrical-thermal analogy, the dynamic models of thermal circuit and hydraulic circuit of pipe represented using circuit equivalents. At the same time, the equivalent circuit model of the air source heat pump considering the operating characteristics of the equipment is constructed based on the table lookup method. In order to improve the simulation efficiency, a new method for modeling and simulation of electric and heating multi-energy systems are proposed based on electromagnetic and electromechanical transient simulation technique. The electric network is simulated in electromagnetic transients program. the heating network which is modeled with basic circuit elements is simulated in electromechanical transients program. The air source heat pump which connects the electric and heating networks is used as interface model. The multi-energy system model is capable of using a large time step of size to maintain high simulation efficiency. Diverse tests are carried out to validate the proposed models.