This project is about designing a tool to help informal caregivers provide better dementia care experiences for the people-with-dementia. There are many different non-pharmacological interventions that can be applied to help deal with the symptoms of dementia. Both understanding the knowledge of non-pharmacological interventions and knowing the people-with-dementia is necessary for informal caregivers to personalized apply these interventions during the daily care. This project is researching this topic and developing a tool to support informal caregivers. The project follows the double-diamond model. Discover: desk research, context inquiry, in-depth interview and collage were applied and different stakeholders were involved to dig deeper into the research questions. Define: The research results were summarized and the design problem, target users and use scenario were defined. Develop: Multiple concepts were created and evaluated by the Objective Weighted during the develop phase. Deliver: One concept was chosen to further detailed, evaluated, iterated and finally delivered. The outcome is a platform, which is an app, for informal caregivers to search and learn dementia-related knowledge and discuss with each other or with the experts. Users can learn different non-pharmacological interventions and knacks on the platform as well.