Against the backdrop of escalating low-altitude threats, critical infrastructure such as power grid substations and oil production facilities are frequently subjected to intrusions by unauthorized drones. Building an efficient low-altitude defense barrier has become an essential industry requirement. By deeply integrating photoelectric turntables with low-altitude monitoring equipment, an integrated collaborative defense system is established. Using the photoelectric turntable as the core sensing unit and equipped with dual-band detection technology, it can accurately capture drone trajectories, identify targets, and transmit data synchronously around the clock, effectively addressing the pain points of traditional defenses and providing solid support for accurate early warning. The low-altitude monitoring equipment relies on front-end sensing data and adopts a combined approach of radio monitoring and navigation risk identification. It can be flexibly deployed in both fixed and mobile modes, and parameter optimization avoids environmental impact on critical facilities and equipment, enabling perimeter detection and early warning for key areas such as substations. The system's collaborative operation achieves fully automated operation, adapting to complex all-weather scenarios, effectively resisting various illegal low-altitude drone threats, effectively protecting the safety of critical facilities, and contributing to the stable and orderly development of the industry.