As the elderly age, their physical condition becomes weaker and their intelligence decreases, which is considered to be normal “old and confused”, but in fact, a large proportion of them are suffering from Alzheimer’s disease. However, most of them are not taken seriously and treatment is often delayed. The most obvious manifestation of Alzheimer’s disease is the “near-event amnesia” – remembering things that happened decades ago, but forgetting things that just happened. Alzheimer’s disease (AD) is a primary degenerative encephalopathy that occurs in old age and pre-mature old age. It refers to a persistent impairment of higher neurological activity, i.e., memory, thinking, analysis and judgment, visual and spatial recognition, and emotion, without impairment of consciousness, The characteristic pathological changes are The characteristic pathological changes are cortical atrophy with β-amyloid (β-AP) deposition, neurofibrillary tangles (NFT), reduction in the number of memory neurons, and senileplaque (SP) formation. Dementia is a syndrome of acquired and persistent intellectual impairment due to brain dysfunction, which is characterized by a decline in acquired occupational and social skills, cognitive decline, memory loss, visuospatial skill impairment, loss of orientation, calculation, and judgment, followed by personality, affective, and behavioral changes in the conscious state. The disorder is progressive and worsens. Memory impairment: Memory is the reproduction of past experiences and occurrences by the human brain, including the process of remembering, retaining, recalling and cognizing (reproduction). In this process things are processed such as classification, generalization, comparison and connection. Therefore, recollection is the processed reproduction of things experienced in the past by the human brain, so there are partial or complete distortions or errors. The incidence of near-event amnesia increases with age, older women have a higher rate of dementia than men, and people with a family history of dementia have three times the risk of getting dementia than others. Secondly, hypertension, diabetes, hyperlipidemia and atherosclerosis are also risk factors for amnesia. In addition, people with a history of depression, narrow interests, trauma, low education, poverty, smoking, and alcohol abuse are more likely to suffer from amnesia.