The virtual demonstration system of popular science knowledge based on VR glasses includes the functions of solar system astronomy science popularization and Shenzhou 11 launch and operation science popularization. Among them, the former is a 3D experience system about popular science knowledge of the solar system, including 3D display of three-dimensional scenes of the solar system, basic knowledge of various celestial bodies, popular science and related astronomical phenomena, etc. It interacts with visitors in the form of VR stereo glasses, which can truly enter the cosmic environment and more intuitively understand the relationship between the sun and the eight planets, perceiving the solar system is a larger celestial system concept and has a macro understanding of the universe. The latter is a 3D experience system about the launch and operation of Shenzhou 11, including the 3D display of Shenzhou 11 and its space three-dimensional scenes, launch process, docking with the space station, space station operation and related space and space knowledge science popularization, etc, while ensuring the explanation of popular science knowledge and virtual demonstration, we should make full use of the advantages of virtual reality technology to have a more intuitive and profound understanding of the knowledge related to the launch and operation of Shenzhou 11.