Machine interaction is inseparable from human. No matter what kind of machine it is, it is ultimately used by human. The relationship between people and tools can be traced back to the times when people invented all kinds of tools to improve work efficiency. In this paper, we analyzed the role and application of psychology in human-computer interaction, and combined with the typical application examples of human-computer interaction, analyzed its application and market value. Finally, we summarized the article and analyzed the future development trend.