CAREBASE is an intelligent service system applied to smart companion for elderly to prevent dementia. It connects an APP for caregivers to give further actions to prevent the symptoms. The design aims to facilitate elderly leading to a healthy lifestyle. Through AI and big data to provide an intelligent platform that can evaluate the user profile, and consider the available options in the market on providing a recommendation solution for the caregivers to get the most out from the designated products. The design includes dementia levelling system, experience of searching products, redesigned interface and customised com panion functions to prevent dementia and improve living experience.