Now with the development of economy, the degree of automation of equipment in various industries is getting higher and higher. Compared with the previous manual ticketing and manual service, the self-service ticket vending machine can be said to be many times more advanced. In fact, the development of science and technology is to 'liberate' people's hands, let people do things that machines cannot do, and maximize the use of human resources. Figure: Self-service ticket vending machine The appearance of the self-service ticket vending machine also looks very fashionable. Of course, it not only looks'dominant', but its functions are very powerful. It replaces manual ticket sales. Humans cannot provide 24-hour service. For it, it is a piece of cake. People like this advantage alone. Someone can experience that when queuing to buy tickets at the station, the conductor suddenly said that the service at the window was suspended, and the line was useless, and he would be very angry. Now that there are self-service ticket machines, this will no longer happen. In addition, its shell is made of metal and the software is stable, which at least guarantees that its failure rate is very low; the operation is simple, and there are hints to ensure that people with low education can also use it, taking into account the popularity of the machine. Through the self-service ticket vending machine, it is realized that passengers are no longer afraid of suspending the ticket sales at the window when buying tickets. Every passenger recognizes it very much, so it has changed the way of buying tickets and also changed our lives.