The campus virtual roaming system is the important content of college information system development strategy, but universities do not widely use it currently. By reducing the cost and technical difficulty, taking a university as the virtual space, the system based on Minecraft platform is constructed by using SketchUp, MCEdit, and WorldPainter to build the scene, and taking command block instruction and Game Mod to implement the function of interaction. Through the upload the map to the server, the system is established. This system has perfect scene and strong dynamic interaction, which is convenient for users to develop and access the system. Experiment proves that Minecraft is a very useful tool for designing a virtual platform.