With the acceleration of the digital transformation and upgrading of power, more and more edge terminal devices are connected to the power system, and the cloud data center of the power system is faced with a series of challenges such as network overload, service delay, and low resource utilization. Aiming at the above problems, this paper expounds the cloud edge collaboration structure based on SDN, analyzes its key technologies and applies it to the power system, designs the application scenarios of cloud edge collaboration in the power system, verifies the feasibility of the method through experiments, and provides references for the system construction and application of cloud edge collaboration technology in the power system.