INTERACTION design is defined as creating a better and more useful relation between the products and users. This word which was first coined in computer science and interface design, nowadays is used in designing of all products. INTERACTION design is newly established. In the world without computers, INTERACTION design hadn't been existed with its modern definition, but today it has been expanded to a great extent that is known as an independent university major. INTERACTION design is a kind of user centered design and is always looking for easier ways for the relation between products and users. The studies show that besides the individual differences, user's mental moods in different times, will affect the way they use the products. Having sympathetic point of view with the users at the time they use the products, shape up the basis of INTERACTION design. INTERACTION design is the creation of a representational dialogue among people and intelligent products, environment and communications encountered in their every day experience. As products become more complicated, often due to technology, designers are facing new challenges in gaining strong user acceptance. The number of people using and developing products powered by some sort of technology continues to grow; these new systems are more functional and robust ever, providing more features, functionality, and capabilities. INTERACTION designers strive to create useful and usable products and .services. Following the fundamental tenets of user-centered design, the practice of INTERACTION design is grounded in an understanding of real users-their goals, tasks, experiences, needs and wants. Approaching design from user-centered perspective, while endeavoring to balance users' needs with business goals and technological capabilities, INTERACTION designers provide solutions to complex design challenges, and define new evolving interactive products. Designing products highly interactive in nature becomes much and more complex than before going beyond traditional realm of industrial design. More ever, the fundamental definition of "a product" is being challenged and requires a fundamental shift in thinking as well as new work methods. How people interact with products, systems or environment and its social and cultural impact is what INTERACTION design is concerned about. Well known companies in today's industrial associations, for keeping survived in challenges and stay famous and being able to sell their products, should gain profits from INTERACTION design in designing their products. In order to know the Iranian users and find out about their manners and attitude regarding the products, a study was carried out. In this study 100 Iranian men and women users above 18 years old were selected randomly. The samples were chosen from different economical and educational background. The study performed by interviewing and filling the questioners regarding the way of using the modem products. The focus of the study was mainly on the digital products. Data were analyzed statistically and biased on the percentage of the answers. The results showed that Iranian have their own especial behavior regarding the products.