Abstract: The full implementation of the combined outward transmission of wind power,solar power,thermal-power and energy storage has become one of the effective strategies to promote the "dual carbon goal" and energy cleaning transformation. In this paper,on the premise of balancing the benign competition of various kinds of combined outward transmission of wind,solar,thermal-power and storage,taking the lowest operation cost and the emission as the objectives,a multi-objective optimization model for the combined outward dispatching of wind, solar, thermal-power and storage is established,and a calculation method combining the target priority method with MATLAB software is proposed,a typical outward transmission demonstration base is selected for multiscenario analysis. The results show that:（1） the total operating cost under the combined outward transmission dispatching scenario of wind,solar,thermal-power and storage are reduced by 2.62%,12.56% and 1% compared with other scenarios;（2）The total waste energies under the combined outward transmission scenario are reduced to 587.9308 MW · h and renewable energy penetration rate reached 20.59%;（3） The output and energy storage capacity of wind and solar energy have a negative relationship with the total cost of the system and a positive relationship with the utilization rate of new energy,which is beneficial to prove the role of energy storage devices in the process of the combined outward transmission and provide a basis for similar projects.