The important reason for dementia is to regulate the emotions, to stop thinking about anger, and to avoid the excess of emotions. To prevent the occurrence of dementia, we should regulate the emotions according to the characteristics of the emotions of the elderly. In the Nei Jing, the treatment method is to use emotions to overcome emotions: for example, anger hurts the liver, sadness overcomes anger; joy breaks the heart, fear overcomes joy, and so on. The importance of psychological treatment is emphasized. Psychotherapy such as explanation, encouragement, enlightenment, consolation and suggestion can also be given according to the patient’s psychological emotions, so that he or she can move his or her emotions and feel comfortable to avoid stimulating the occurrence of this disease. In addition, physical exercise should be insisted on, such as doing qigong and taijiquan, listening to music, etc., and carrying out qin, chess, calligraphy and painting activities according to their own hobbies, in order to cultivate emotions, so that emotional stability, body and soul, can play a role in the prevention of dementia.