Audiovisual dysfunction is the largest group of people with delayed language development in children. Audiovisual dysfunction not only affects children's normal communication, but also hinders their growth, becoming the main reason affecting their life and learning. In China, medical resources for children with audiovisual dysfunction are obviously insufficient and cannot be valued. Rehabilitation exercise cycle is long, patients and their parents can not adhere to long-term. Aiming at these problems, this paper tries to design and study the family treatment system of audio-visual dysfunction independently. User experience design users for zhongtun, jizuatun and li experience full link, pay attention to the details of each experience point, strive to accurately complete each treatment training, in the most efficient display space, play the training function of the acme. Behind the emotional expression, a good design with common characteristics of user experience is made through the front iteration process of user model establishment and data accumulation. The research content of this paper: firstly, it studies the principle of user experience, analyzes the influence of mobile devices on preschool children, and discusses the characteristics of existing children's educational toys and children's interactive products, as well as the physical characteristics and characteristics of preschool children. Then, the classification, causes and treatment of children's visual and audio impairment are discussed. The design method of combining the theoretical movement of user experience with children's audio-visual functional family therapy system; After that, more effective user requirements were collected through observation of target user behavior, single interview, and exploration of storage and modeling. Summarize user requirements, build user models in story form, and prioritize requirements.