Surgery is perceived as a process of “opening” and “stitching”. Open abdomen, which has the longest history in the field of surgery, is not unfamiliar to anyone, while laparoscopic surgery, which may be unclear to some, is a new minimally invasive technique that is also widely used. Among the more representative ones are cholecystectomy, appendectomy and bariatric surgery. So what are the advantages of the new laparoscopic surgery over the traditional open surgery? Those who have some knowledge of laparoscopy may have a suspicion that laparoscopy mainly performs surgery by observing the inside of the body through a lens, and many people feel that the perspective that the lens can show is not intuitive enough compared to open surgery, which has a certain impact on the accuracy of the surgery. In fact, this is a very common misconception. The laparoscope itself is a very fine instrument with 4-fold magnification, which can meet many surgical operations, although some larger operations are still performed in the traditional open form, as long as the operation can use the laparoscope has passed the safety test. The main advantage of laparoscopy is that it is “minimally invasive” and the small size of the surgical incision means that the bleeding is low, making it difficult to risk excessive bleeding due to errors and a high error rate. In addition, it is believed that most of the people who need bariatric surgery have strict requirements for their body appearance, so minimally invasive surgery can be almost “scarless” after recovery, especially in single-port laparoscopic surgery. Therefore, the safety of bariatric surgery is a good guarantee based on the laparoscopic procedure.