This project is made with the Unity engine, using a HMD(Head Mounted Display) named HTC Vive. Firstly, I used 3ds Max modeling software to create the models of the train and the scene. Secondly, I imported these models into Unity to create the virtual scene. Thirdly, I finished the function I need in this system, such as walking in the virtual scene, touching every single part of the train and viewing the introduction of every single part of the train. Taking the steam train as an example, this system has simulated the disassembly and assembly operations of the train wonderfully.