Abstract: Wind and solar energy have complementarity in terms of time and geography, which enables wind solar complementary power generation systems to reduce some equipment investment when applied in remote mountainous areas, with high cost-effectiveness and broad application prospects. This article designs a wind solar complementary system based on PLC control. The main program control adopts Siemens 1200 series PLC, and the monitoring system adopts ForceControl V7.1 software. This article provides a detailed explanation of the software and hardware composition, structure, and design of the wind solar complementary control system, while completing the PLC program writing and configuration software design. Finally, the author summarizes and concludes the entire text.