Recently, we have met some patients with severe cervical intraepithelial neoplasia who are troubled about whether to have surgery or not, and want to have surgery but are afraid of it, especially some young patients who have not had children. First of all, what does cervical intraepithelial neoplasia mean to the patient? Severe cervical intraepithelial neoplasia actually means that three thirds of the epithelial cells of the cervix have undergone oncological changes, and if the cells of the cervical epithelium cross the basement membrane, it becomes invasive cancer of the cervix and becomes a cancer that everyone fears. Therefore, when cervical intraepithelial neoplasia, a precancerous lesion of the cervix, occurs, it is best to get rid of it before it becomes cancerous. Because once it becomes cancer, cancer cells can spread from the cervix to other organs, such as bone metastasis and liver metastasis, due to the invasive nature of cancer, which can be life-threatening. So, understanding the horror of cervical intraepithelial neoplasia, is it necessary to remove the uterus? No, because cervical intraepithelial neoplasia is not yet aggressive enough to be removed. Therefore, the preferred option is to have a program that gets rid of the lesion while preserving the organs is the best way, therefore, performing cervical conization is the preferred option. This can be done with LEEP or with cold knife conization, depending on the surgeon’s surgical skills and surgical habits. Of course, if the patient has other diseases or does not want to preserve the uterus, a total hysterectomy can be performed directly. The advantage of cervical conization is that the uterus is preserved, which does not affect the patient’s menstruation, sex life, pregnancy, and the operation is less damaging, faster recovery, and less expensive, but the disadvantage is that it must be reviewed regularly, because since the uterus is preserved, there is a possibility of recurrence or new diseases. The advantage of total hysterectomy, on the other hand, is that it “removes the after-effects forever” and the operation does not have to worry about the recurrence of disease and other problems, but the disadvantage is that the operation is very damaging, expensive, requires inpatient surgery, and the ability to get pregnant is permanently lost.