Cervical screening, as it is called in clinical practice, is mainly to check whether there is cervical intraepithelial neoplasia or cervical cancer. Cervical screening is mainly divided into three steps: first, the main cervical TCT examination, now in the clinic more combined TCT and HPV screening at the same time.TCT examination is only to take the patient’s cervical squamous-columnar junction cells for examination, to determine whether there are cervical lesions. However, the examination site is very limited, and the accuracy may not be high depending on the amount of material taken, so it is recommended to combine with HPV screening. If there is HPV high-risk type 16 and 18 infection, it proves that there is a higher chance of developing cervical lesions. If there is no HPV infection, the chance of cervical lesions is generally lower. Second, colposcopy. If the patient has problems with the first step of the examination, colposcopy is performed. Third, cervical biopsy. Cervical biopsy and colposcopy are often performed together, usually in the colposcopic examination of the suspected lesions, take part of the cervical tissue for pathological examination. This can ultimately determine whether the patient’s cervix is diseased, and what type of lesions are present.