As we all know, it is human nature to love beauty. For dental and maxillofacial deformities, it is difficult to let go of either congenital defects or acquired cripples. The booming orthognathic surgery has brought a boon to patients with dental and maxillofacial deformities. Dentofacial malformation is a kind of misalignment of bite and facial shape and proportion caused by abnormal jaw development. The common malocclusions include: mandibular protrusion (geodontia), maxillary protrusion (bulging teeth), small jaw (bird’s mouth deformity), maxillary recession (disc-shaped face), facial asymmetric deformity (crooked face), mandibular angle and bite hypertrophy (square face) and zygomatic bone too high or too low, etc. In addition, cleft lip and palate, tumor and maxillofacial trauma secondary to orthognathic surgery is also the object of treatment. In addition to occlusal dysfunction, these deformities also affect the aesthetics of the patient’s face to varying degrees. The role of orthognathic surgery is to transform the less pleasant facial contours into a beautiful and appealing appearance. To be precise, orthognathic surgery is the application of surgical and orthodontic means to correct dental and maxillofacial deformities in order to cure the deformity, restore the function, modify the structure and achieve the purpose of beauty. It allows patients who desire to change their dental and maxillofacial deformities to realize their wishes. Modern orthognathic surgery is based on the ideal facial structure relationship and ratio to reassemble the facial skeletal position through precise measurement and design, using advanced special jaw surgical instruments and referring to the national facial soft and hard tissue data of the aesthetic population. This surgical technique does not leave any surgical scars on the face from the intraoral approach, and can not only correct serious dental and maxillofacial deformities, but also create beauty by improving the facial contour and “adding flowers” for the patient, which can be described as a miraculous work, which is incomparable to the traditional cosmetic surgery limited to soft tissue plastic surgery, and is known as It is known as “the art of face sculpture”. With the continuous enrichment of the basic theory of modern orthognathic surgery, the perfection of preoperative and postoperative orthodontic techniques and the comprehensive application of various auxiliary surgical techniques, modern orthognathic surgery has undergone the development process from multi-stage surgery to the completion of multiple surgical combinations at one time, from multiple surgical procedures to correct a class of dental and maxillofacial malformations to a few classical surgical procedures to correct multiple dental and maxillofacial malformations. Today, the standard simultaneous bimaxillary surgery (including LeFort type I osteotomy of the maxilla, mandibular ascending osteotomy and horizontal osteotomy chinplasty) has become the most widely used basic surgical technique in orthognathic surgery. With the combination of the three basic surgical procedures and other auxiliary surgeries, a wide range of common dental and maxillofacial malformations can be successfully treated with good orthodontic results.