In order to obtain relatively controllable power output and ensure the safe, stable and efficient operation of the power system, based on the development trend of multiple access and the development path of electric carbon coupling, a construction method of multiple coordinated planning model combining the system demand forecast, power quantity balance and renewable energy quota is proposed. The experiment proves that the model established can estimate the cost of electricity carbon, and the planning results can be used to alleviate the inconsistency between power resources and load demand, and provide theoretical reference for increasing the installation proportion of clean energy, reducing carbon emission, and optimizing the power structure.