Abstract: Upper airway is an important component of the human body. With the application of various imaging methods, it has been known deeply. Previous research has its limitation and unreliability, and now CBCT is becoming an useful method to study airway morphology and size. The present research progress at home and abroad are summarized. A variety of airway division standards, a variety of analysis and measurement software method are introduced. they investigated the difference of the upper airway morphology between different skeletal patterns mainly by measuring projects such as the airway volume, length, area, anteroposterior and lateral dimensions of cross-section, so as to guide the treatment of micromaxillary deformity and airway disease.