Robot is an intelligent machine that can work fully or semi-automatically. It has basic characteristics such as perception, decision-making, and execution. It can assist or even replace humans to complete dangerous, heavy, and complex tasks, improve work efficiency and quality, and serve human life. Expand or extend the scope of human activities and capabilities. At the subway station, we can often see the staff conducting security checks and directing directions to ensure people's travel safety and provide enthusiastic services for people. With the continuous progress of science and technology, the subway border inspection robot appears in our sight. We can see a dignified small robot bringing us warm service. The design creativity of the border inspection robot originated from the small inspector. It has appeared in the 18-year industrial design exhibition and Shenzhen Bay Customs. It wears a police cap and looks like a people's police. It adopts advanced artificial intelligence technology, has intelligent AI voice interaction function, supports multiple languages, has the functions of echo cancellation, noise reduction and noise reduction, and can communicate with people without barriers. There is a large LCD screen on the body for people to browse information or consult. It also has the function of self-service navigation, accurate location, and can let the border inspection robot lead the way through voice communication. It can be charged automatically, and when the power is insufficient, it can automatically return to the charging pile for charging, and the standby time is long. It can not only help border inspectors maintain order, but also provide people with diversified and humanized services such as ticket purchase guidance, explanation of surrounding culture, voice crew consultation, free printing of photos, safe travel broadcast, traffic information display, etc., so that people's travel and life are more convenient. The design of border inspection robot has good environmental adaptability, which can be applied not only to subway stations but also to railway stations, airports and other places.