Facing the prevalence of dementia in the aging society, this study aims to understand the current situation of dementia elderly people participating in cognitive learning activities in dementia service bases. Aims: The main purposes are: (1) Understanding the learning connotation of elders with dementia participate in dementia service bases; (2) Understanding the changes of elders with dementia who participate cognitive learning activities in dementia service bases. Methods: This research interviewed 3 Caregivers of elders with dementia and a main person who manage the dementia service bases. The semi-structured in-depth interview method of qualitative research is adopted to obtain research data. Then the data were analyzed and management. Results: The following conclusions are summarized: (1) The diverse needs and wishes of dementia caregivers are an important key to whether the elders with dementia participate in dementia bases. (2) When providing learning activities for the elders with dementia, it is necessary to meet their learning characteristics, maintain the flexibility of activities and give sufficient time to practice. (3) Nostalgic activities are the most popular among the learning activities that provide a blend of cognitive promotion. (4) The overall cognitive function of the elders with dementia has short-term and sustained effects. This research proposes three recommendations in response to the research conclusions.