Abstract: Explore the impact of the design elements of the smart bracelet on user preferences. Firstly,
analyze the smart bracelet design elements that affect user preferences based on the evaluation
construction method in Charm engineering. Then, the key design elements are screened by the
principal component analysis method, and the level of each key design element is obtained through
expert interviews and literature research. Finally, virtual bracelet product samples are based on key
design elements, and user preference joint analysis model of the smart bracelet is constructed using
joint analysis. Ten important design elements and 27 levels and weights are determined for the user
preference joint analysis model. Based on which, smart bracelet design strategy is proposed to
provide a theoretical basis for improving the smart bracelet design practice in the future.

Key words: smart bracelet, user preference, joint analysis