Based on the needs of elderly users, this paper analyzes the physical experience and feelings of the elderly when using the product and therefore obtains user preferences in combination with the user's multi-channel perception characteristics, so as to promote the design of elderly products and meet the physical and psychological needs of users. Rehabilitation aids for the elderly were taken as the design carrier, the optimal sequence diagram method and behavior map method were used to analyze the data and thus construct the association model between user needs and physical behavior, and the problematic actions and related touch points in the interaction process were investigated to guide the subsequent design research. Based on the 0-order perceptual concept method of Kansei engineering, the 0-order PAD emotional vocabulary derivative model was constructed. The semantic difference method was used to obtain the user's perceptual image data of the product, and the principal component analysis, Pearson correlation analysis and other methods were applied to obtain problematic actions of user needsa and related touch point preferences.Based on the design elements derived from the evaluation results of the perceptual image and the degree of affection, the design practice of the liquid cup for the elderly was carried out, and the design scheme was verified by the fuzzy comprehensive evaluation method. Starting from the user's personal perception and needs, the preference of elderly users for using products is collected combined with Kansei engineering-related methods, and thus provides objective theoretical basis and practical verification for design practice, as well as certain design research references for the design of elderly products.