Abstract: Park integrated energy system（PIES）is a terminal energy supply system integrating cold,heat,electricity and other energy sources,which can effectively improve the consumption rate of renewable energy and the comprehensive utilization level of energy.In order to realize the low-carbon economic operation of PIES,a multi-objective optimization operation model of PIES was established.Firstly,the energy structure of typical PIES was analyzed,and the operation mechanism of PIES was studied.Then,the steady-state modeling of the key energy equipment of the system was carried out. Moreover,a multi-objective day ahead optimization model considering the lowest system operation cost and the least carbon emission was established,and the multiobjective problem was transformed into a single objective problem by introducing the carbon emission penalty factor.Finally,the operation mode and operation cost of PIES under different optimization objectives were compared and analyzed through an example.The results show that the model can effectively reduce the operation cost and carbon emissions of the system under the comprehensive optimal goal,and realize the low-carbon economic operation of the system.