1. Interface design: the design of physical presentation layer. Every product or interactive form appears in this form, including graphics, icons, colors, text design and so on. , through which users can use the system.
2. Interaction design: UI refers to information collection and feedback, input and output, and is an interface-based interaction between people and products. At this level, Ul is understood as user interaction, that is, user interaction, which is the significance of the appearance and existence of the interface.
3. User research: study the psychology and behavior of users, and design the interface structure, behavior and vision from the perspective of users. In the context of big data, in the information space, interaction will become more free, natural and ubiquitous. With the development of technology, design concept and multi-channel interface, until the appearance of pervasive computing interface, the interaction experienced by users is subconscious or even unconscious.