In order to promote clean energy heating and improve heating quality and efficiency of municipal heating in northern China, an optimal operation strategy of heat pump system in urban heat exchange station is put forward. Firstly, the equipment of heat pump system in urban heat exchange station is modeled；Secondly, the interactive scene between heat pump supplementary heating system and power grid is constructed, including responding to peak-valley average electricity price and participating in peak-shaving auxiliary service market；Then, a double-objective optimization model with the lowest operating cost and the best stability of heating network is established,which is transformed into a single-objective optimization problem and solved by particle swarm optimization algorithm；Finally, four heating schemes are comparatived and analysed through an example, and the economy and low carbon of proposed model are verified model,which provides a new idea for the low carbon transformation of urban heating.