If facial plastic surgery is used to treat facial asymmetry, all surgical techniques of facial plastic surgery and facial contour plastic surgery are used. There are various degrees of facial asymmetry. In order to choose the appropriate technology among various technologies, detailed diagnosis is needed. In order to diagnose facial bones, X-rays and dental models with similar measurement accuracy should be prepared, and then surgical methods should be decided according to these X-rays and models. The more serious the asymmetry, the more kinds of operations. The postoperative effect is to correct the height difference of maxilla, the phenomenon that mandible leans to one side, the asymmetry of both sides of mandible and the central position of teeth. Through this operation, an asymmetrical face can be corrected into a symmetrical face. Like other maxillofacial plastic surgery, it is performed simultaneously with orthodontics, and the operation time is about 2-5 hours.