In view of the numerous space storage problems faced by youth joint rent groups in first-tier and second-tier cities under the background of urbanization, the work aims to establish a research method based on fuzzy Kano model to establish the importance of users' space demand, so as to clarify the demands and priorities of users at different levels, and thus guide the design. Starting from user demands, according to KJ integration including tenants, experts in related fields, owners, etc., storage space user demand list statistics were classified. The fuzzy Kano model was used to analyze the user demand list of storage space, and the demands were divided into basic, expected and excited categories. Then the importance calculation function of the three types of user demands was established, and the priority ranking was completed to provide guidance for R&D and design. Combined with the opinions of users, experts and owners, the fuzzy Kano model is used to calculate the importance of demand. The ranking of priority demand indexes to improve user satisfaction is obtained, which provides reference for the design of storage space. It effectively avoids problems such as the results obtained from single Kano model are too subjective, the user satisfaction survey is not clear, and the single demand type cannot be prioritized. The design and transformation strategy of space storage is put forward and verified through practical cases.