Older adults who use their brains regularly and exercise more can effectively slow down the aging process of the brain and contribute to the prevention of Alzheimer’s disease. For Alzheimer’s disease, prevention is the best way. Older people should participate in group activities and exercise their brains by reading books, newspapers, writing, drawing, singing, dancing, playing poker, mahjong, etc. They can also use simple crossword puzzles and jigsaw puzzles in their daily lives to train their minds; they should exercise more, such as walking, practicing Taijiquan, Badaanjin, etc. This will help keep their bodies and minds in good condition; their children should communicate more with Children should communicate with the elderly and create conditions for a rich daily life to avoid long-term pessimism, depression and loneliness; ensure a balanced diet and eat more fruits and vegetables. Many people with Alzheimer’s disease suffer from chronic diseases such as hypertension, diabetes and coronary heart disease before they get sick. For those who suffer from cardiovascular diseases, it is important to treat them in a timely manner and take good care of them on a daily basis to reduce the probability of developing Alzheimer’s disease. When elderly people experience memory loss, which affects daily living activities; difficulty in handling familiar things and daily household chores; difficulty in expressing language; confusion about time, place and people; decreasing judgment; decreasing comprehension or ability to arrange things rationally; often putting things in inappropriate places; emotional ups and downs, mood swings and mood swings; personality changes; loss of initiative in doing things, etc. The symptoms should be brought to the attention of family members.