Alzheimer’s disease, also called senile dementia, usually starts insidiously and progresses slowly. Patients can conduct self-tests by evaluating their cognition through methods such as drawing clocks, and they can also determine whether their memory is declining by recalling what they did that day. However, it should be noted that self-assessment is not a substitute for clinical diagnosis. The specific procedure of the clock drawing test is as follows: the patient draws a clock on a piece of white paper by himself and marks the specified time, such as 12:30, etc. and tries to finish it within 10 minutes. and try to complete it within 10 minutes. It is then scored to assess the patient’s cognition. Patients can also determine if they have memory loss by recalling what they did that day. If the things done that day cannot be recalled at all, memory loss may be present and hospitalization is recommended. If the symptoms are further aggravated, aphasia, loss of recognition, psycho-behavioral symptoms, personality changes, reduced abstract thinking and logical thinking may occur. Patients with Alzheimer’s disease can conduct self-tests in the above ways, but it should be noted that self-tests cannot replace clinical diagnosis. If the corresponding symptoms appear, they should seek medical treatment in time. The disease cannot be cured completely, but appropriate medication can be given to help improve the patient’s symptoms, improve the quality of life and reduce the burden on family members.