In order to explore a smart bracelet design strategy that is more suitable for the elderly, this paper studies relevant literatures and related products of smart bracelet at home and abroad, and sorts out basic concepts and related technologies of implicit interaction theory. Through questionnaire survey and semi-structured interview, we summarized. the basic characteristics of the elderly and the corresponding pain points of using smart wristband. We built a smart bracelet design scheme for the elderly based on implicit interaction theory, which provides certain theoretical support and practical reference value for the follow-up study on the age- suitability design of smart bracelet.