Alzheimer's disease is a degenerative disease of the nervous system. The diagnosis of this disease mainly relies on the clinical manifestations of the patient, as well as some corresponding scales and some corresponding imaging examinations. In terms of examinations, it is necessary to check some neurofunctional scales, mainly cognitive function scales, common scales include some MMSE scales, and some MoCA scales. These scales are very important for diagnosing this disease. In addition, some imaging examinations need to be improved, mainly including cranial magnetic resonance imaging examinations. Cranial MRI can reveal atrophy in the patient's temporal lobe, hippocampus, and other areas, which also have an important reference value for the diagnosis of the disease. Moreover, an electroencephalogram can be performed to see some mild abnormalities, and lumbar puncture tests can also reveal some abnormally increased protein deposits.