Abstract: With the rapid development of distributed energy, the energy Internet with multi energy complementation as the core has become a new energy network structure trend. Aiming at the integrated energy system with electricity, cooling and heating interconnection, an optimal scheduling method of integrated energy system considering carbon emissions is proposed. Firstly, the models of electric, cooling, heating and energy storage equipment are constructed, and the output constraints of equipment are analyzed; Secondly, consider the fluctuation of photovoltaic output and the real-time of load change. With the system operation cost and carbon emissions as the target, the optimal scheduling model of the electricity cooling heating integrated energy system is built. NSGA-II algorithm is used to solve the model; Finally, combined with the actual application of a park integrated energy system project, the effectiveness of this method is verified. The results show that the integrated energy system optimization scheduling method taking into account carbon emissions can reduce the operation cost of the park, reduce carbon emissions, promote the consumption of new energy, and achieve peak shaving and valley filling of the power grid.