The difficulty of intellectual training can be chosen according to the cognitive function of the patient with dementia, and each time should not be too long, but it is important to drill frequently and repeatedly, which will help to delay the decline of intelligence. 1.Puzzle training: Through repeated attempts, pieces of various shapes can be put together to form a picture, which can cultivate a rich imagination and improve the flexibility of thinking. 2.Analysis and synthesis training: Let dementia patients pick out animal, food or tools from many pictures or objects. 3. Comprehension and expression training: The patient with dementia can be told some stories (either from life or from movies, TV, or novels), and after the story is told, the patient can be asked to retell the summary of the story or to answer by asking questions. 4.Social adaptability training: Encourage dementia patients to communicate with others by attending various health care seminars and fellowship meetings in the community. 5. General knowledge training: Teach dementia patients the knowledge that they need to use frequently in their daily life, such as the concepts of time and date.