Due to the lack of spatial panorama detection and perception in traditional substation field monitoring technologies and methods, it is not conducive to obtaining the actual situation of substation under unmanned and intelligent operation. By using 3d lidar and other panoramic sensing technologies and methods, a 3d real-time unmanned sensing system for intelligent substation is constructed. By adopting the mode of static and dynamic combination, not only the panoramic effect of the substation can be obtained, but also the moving body around the substation can be recognized. The three-dimensional real scene system of the substation constructed can vividly present the physical whole picture of the substation and monitor its change information in real time, which is helpful for the maintenance personnel to understand the overall operation status of the substation. It has accumulated engineering practice experience for the construction of ubiquitous power Internet and provided some reference value.