Designing human-computer interaction, as the name suggests, is a branch of the study of how humans and machines (or systems) communicate or operate to better adapt machines to humans. We must first have a complete understanding of the human body. Only by fully understanding your own body’s ability to stretch and range of activities can you be confident in your own abilities, so that people can better use us in the design and construction of machinery or systems. This article aims to study the role of intelligent multimedia man-machine exchange in product design, so as to realize the application and development of intelligent multimedia man-machine exchange technology in various fields. This paper proposes to focus on human-computer interaction design and also proposes the algorithm of PNSR index and the method of remote control of equipment and human-machine monitoring. Through the performance, development prospects, and development trends of human-computer interaction design in product design, human-computer interaction is introduced. The importance is of interaction design in today’s product design. The experimental results of this paper show that the intelligence coefficient of my country’s main intelligent network equipment has reached 245, which has exceeded the world average coefficient level and its utilization rate has exceeded 39%. Therefore, the conclusion of this paper is that human-computer interaction design plays a role in promoting the development of mobile products. It plays an important role.