With the progress of information technology, point-of-sale system is an indispensable information management system in the restaurant industry. Although the establishment of the point-of-sale system can improve the efficiency and service quality of the restaurant industry, the system is not considered in the design And human-computer interaction, but will cause a number of problems, these problems include low satisfaction and low acceptance level of the user's operating system, as well as causing operational errors. The purpose of this research is to evaluate the human-computer interaction and interface usage of the point-of-sale system through the human-machine interaction viewpoint. The improving method of the interface design of the system is proposed and a future design, establishing and improving the interface design Guidelines of the point-of-sale system for reference can be developed.