Cervical smear can check whether there is any abnormality in the cervical cells, which is a way to screen for cervical cancer. Nowadays, most of the clinical cervical smear tests have been replaced by cervical TCT tests. A cervical smear is a commonly used early gynecological examination, which involves taking a small amount of cervical cells from the cervix and then observing them under a microscope to determine whether there are any abnormalities in the cervical cells. By observing the cervical shedding cells, it is possible to initially determine whether or not there are cervical lesions. The results of cervical smear can be divided into five grades, grade 1 indicates normal, grade 2 indicates cervical inflammation, grade 3 and grade 4, grade 5 suspicion of cervical pre-cancer or cervical cancer, need to do colposcopy to take a biopsy, and determine cervical lesions by doing pathological examination. It should be noted that most of the clinical cervical smears have been replaced by cervical TCT. Women with a history of sexual life should go to the hospital regularly for cervical screening, which can lead to early detection and treatment of cervical cancer.