Fitness bike can exercise leg muscles well, and you can also experience the feeling of cycling outdoors indoors, and the exercise effect is also simulated, such as the environment and so on. The indoor exercise bike is based on virtual reality technology, takes the exercise bike as a human-computer interaction tool, comprehensively uses sensor technology and DSP control technology, adopts multi-thread and non-blocking data real-time communication technology, and is realized by multi-channel interaction technologies such as stereoscopic display. Let participants roam in the virtual environment.