There is no exact time for the survival of a person with Alzheimer’s disease who is bedridden for many years, which is closely related to daily care. The natural course of Alzheimer’s disease is usually 5 to 10 years, with some surviving more than ten years, but the percentage is relatively small. Due to the progression of the disease, Alzheimer’s patients lose the ability to take care of themselves, become bedridden, and eventually die due to complications such as bedsores, lung infections, and urinary tract infections. Therefore, the survival period of Alzheimer’s disease patients who are bedridden is closely related to their daily life care. If the care is not proper, the emergence of serious complications such as lung infections and urinary tract infections can be life-threatening at any time, and if the care is proper and there are no obvious complications, the survival period will be relatively long, and it may be as long as 3~5 years. Patients with Alzheimer’s disease should strengthen their daily care to prevent complications and prolong their life.