This system takes Nanyang Institute of Technology as an example, integrates three-dimensional simulation, virtual reality and other emerging technologies into the construction of digital campus, and makes use of the advantages of virtual reality technology, such as high reduction, strong interactive experience, easy editing and operation, to make a virtual campus roaming system. The function of virtual campus interactive roaming system based on Unity3D is as follows: (1) Campus and surrounding virtual scene display. The virtual campus interactive roaming system can show the appearance of Nanyang Institute of Technology, including the library, Qi Xian Square, rockery, waterfalls, pavilions, surrounding bridges and so on. (2) First person roaming. Users can use the keyboard and mouse to manipulate the first person perspective, and can roam freely in the virtual scene to achieve walking, running, jumping and other functions. The roaming system is a height simulation of a real scene. The user can choose to watch the virtual three-dimensional scene by controlling the mouse and the keyboard. (3) different weather arbitrary choice. Users can choose different weather according to their own preferences to achieve campus roaming in different weather. Mainly including sunny, rain, snow and other weather, as well as day, night and other time. (4) can choose to arrive at the designated place. You can view designated locations on campus by selecting different purpose scenarios. Including the top scenery, the island in the lake, Qi Xian Square, the small waterfall, the lake scenery, the platform scenery, the library hall, the library study room and so on. For other scenes, need to switch to the first scene roaming reachable. (5) the design of user interface. It ensures the coordination of the functional core and the man-machine interface, making the user experience more friendly during roaming. User groups: people from all walks of life Work Vision: The campus is the cradle of cultivating talents and the sacred place to nurture the future of the motherland. Private schools need to raise their profile to recruit talent, and so should public schools. The image of the school can reflect the educational strength of the school from some angles. If the image can be recognized by people, high-quality teachers and students will be well-known. All aspects of the construction of the school can be further improved to bring a better learning environment to the school teachers and students. The production of three-dimensional campus using polygon modeling technology, making the campus scene more real image. After mapping and optimization, people can understand the actual situation of the school in a short time, so as to occupy a favorable position in the competition. Virtual campus roaming system can not only fully show the campus landscape, to promote and display the campus civilization goals, but also for the school teachers and students supply information, complete the educational auxiliary effect, build digital campus. It is hoped that after this, the three-dimensional scene can be further optimized, the efficiency of three-dimensional scene construction can be improved, and more interactive functions can be developed, so that the virtual campus can be further integrated into human life, so that human beings can obtain information more conveniently and quickly.