Relevant surveys show that the average survival life expectancy after suffering from Alzheimer’s disease is only 5.9 years, but the aggravation of the disease can be delayed by relying on timely detection and treatment. With Alzheimer’s disease, the time from discovery to death is usually only 3-5 years, but if early detection and treatment, life can be extended to more than 10 years. If the patient’s life can be delayed for 10 years if the disease is detected and treated in the first year, then the patient’s life may only be delayed for 4-5 years if the disease is detected and treated in the second year. The clock-drawing method can determine the cognitive ability of the elderly. If the elderly can basically draw the position of the 12 numbers on the dial, the position of the hands, etc., and the score reaches the standard with reference to the scoring criteria, the family members can basically judge that there is no decline in the cognitive ability of the elderly. Generally, people with high blood pressure, diabetes, stroke, high blood fat or obesity and less movement are prone to Alzheimer’s disease. In addition, Alzheimer’s disease is hereditary. It is best for the elderly to control high blood pressure, diabetes and other diseases first, eat more fruits and other foods containing more vitamins, and eat more foods rich in trace elements, such as walnuts, nuts, peanuts and so on. In addition, we must pay attention to appropriate exercise, make more friends, participate in more activities, put the mind at peace, usually take some blood-activating drugs and anti-platelet drugs, can also prevent the elderly stroke and Alzheimer’s disease. For seniors suffering from Alzheimer’s disease, “Our concern is not what they have lost, but what they still have. Even in the middle stages of the disease, seniors should be allowed to do what they can.” For example, an elderly person with dementia could be asked to pick up the newspaper every day, etc. However, sometimes the elderly need the help of those around them to accomplish something alone, and this is when they should not deliberately hide their illness from their surrounding neighbors because they feel dishonored.