The work aims to design the intelligent wheelchair equipment for patients with motor impairment to realize high-quality and easy-to-manage functional requirements, thus guiding the concept design. A method of requirement acquisition and requirement quality assessment based on user story-requirement quality assessment (US-RQA) was used. Firstly, the user requirement set and product function configuration table were obtained from existing users and existing products respectively. Then, the quality of the requirement set was defined, and the integrity, consistency and accuracy of the obtained user requirement set were evaluated. Finally, according to the evaluation results, the final user requirement set was obtained by recalling and modifying the requirement set. By combining the function configuration table and the end-user requirement set, the functional specification table of intelligent wheelchair for MI patients was obtained. Under the guidance of this, the design of intelligent wheelchair for MI patients was carried out, and the design scheme was simulated with the help of 3D modeling software and AIGC technology. The integration of user requirement route and product function requirement route in product requirement analysis makes up for the one-sidedness and limitation of obtaining requirements through a single way, and combined with the requirement quality assessment method based on US-RQA, an innovative product function requirement analysis model is constructed, which is helpful to guide the design of intelligent wheelchairs for patients with motor impairment and provides a reference for design ideas of product design for specific groups of people.