The general course of Alzheimer’s disease is about 5-10 years, with a few patients surviving for 10 years or more. Alzheimer’s disease is a progressive degenerative disease of the nervous system with an insidious onset. It is the most common type of dementia in old age, accounting for about 50%-70% of dementias in old age. The mild stage of Alzheimer’s dementia is mainly characterized by memory impairment; in the moderate stage, memory impairment continues to worsen, and the ability to work, learn new knowledge and social contact decreases, and aphasia, loss of use, and loss of recognition may occur; in the moderate stage, there is also emotional indifference, bitter laughter, loss of speech, and inability to perform simple daily tasks. There is no cure for the disease. Patients with advanced and severe disease can have a severe reduction in their own living ability and even become bedridden for a long time, which often leads to malnutrition, lung infections, urinary tract infections, pressure sores and other complications, and then accelerates death. In conclusion, the exact length of time a patient with Alzheimer’s disease can live varies from person to person, and careful, scientific care is especially important to reduce the chance of serious complications and thus extend the patient’s life to some extent.