With the increasing advances in surgical techniques and anesthesia methods, research on improving body shape has never stopped. In the late 1970s, liposuction was introduced, which had a profound impact on changing the shape of the body and shaping it. By the 80’s and 90’s, the public attitude towards cosmetic surgery in western countries has been a clear recognition and approval attitude. A random survey abroad reported that in 1982, 32% of people with poor body image (the vast majority of women over the age of 25) agreed to have body contouring surgery for themselves or others. By 1988, this percentage had risen to 48%. In the United States, an estimated 55,900 people underwent liposuction in 1984, a number that increased to 101,000 in 1988. When choosing a cosmetic procedure, women in the United States preferred liposuction, with men as a third choice. Liposuction of the hip and thigh areas ranked first, followed by the abdomen, buttocks and calves. In China, the situation is different, as we do not have the “European eyes and nose” of the Caucasian race, and there are not as many obese people, so most people in China choose blepharoplasty and augmentation, etc. Liposuction is also performed on the abdomen first, followed by the hips, thighs, buttocks, calves, upper arms, etc. What is liposuction? Liposuction is the removal of subcutaneous fatty tissue from the body in an attempt to achieve a body shape that is attractive to modern people. The method of removing fat by suction is significantly better than traditional liposuction, which can lead to scarring deformities. The development of anesthesia technology, especially swelling local anesthesia, has been able to greatly increase the amount of liposuction and make it safer. As a result, liposuction can be performed in ward patients or in outpatients (i.e., without hospitalization). Almost all superficial body fat (subcutaneous fat) can be removed by the surgeon’s suction tube. The subcutaneous fat layer is located between the skin and the deep fascia (the fascia that surrounds the muscles), which is attached to the deeper structures by many fibrous intervals. These fibrous intervals are like numerous cords that pull the skin tightly to the surface of the body, and what is called subcutaneous fat is a myriad of fat globules caught in the fibrous intervals. The task of liposuction is to extract the fat globules with as little damage as possible to the fibrous septa because the blood vessels, nerves and lymphatic vessels that go to the skin travel within the fibrous septa. The human subcutaneous adipose tissue is collectively known as the superficial fascial system. The system contains fat and fascial-like tissue compartments, divided into a halo layer and a lamellar layer. The halo layer is located in the subdermis in all parts of the body and is composed of fine fat particles; it is closely embedded in the fibrous septum. The lamina propria is located in the deeper part of the halo layer, superficial to the muscles. It is composed of large fat globules loosely embedded in the fibrous septum; it is more lax than the halo layer. The obesity of human body is mainly expressed in the platysmal layer, and it is also the main expression that affects the beauty of the shape. Fat aspiration of the platysmal layer can achieve the purpose of weight loss. The fat aspiration of both the platysmal layer and the halo layer can achieve weight loss and shaping. The halo layer has more skin retraction after fat aspiration, which results in good body contouring. To do the inner sculpting with a rigid metal tube, the operator must have the following three conditions: (1) knowledge of anatomy; (2) understanding of human body proportions; and (3) dexterity of hands. Liposuction is operated under blind vision, and practice allows for the proper and correct technique of hand position and direction of movement. The position of the hand is very important in order to feel the activity of the suction tube and the fat. Regarding suction tubes, fine caliber ones are used for the torso and thighs. The prior tunneling method was very popular some years ago and aims at smoothing the operative area. If the suction tube is less than 4 mm in diameter, there is no need to do prior tunneling for this method. The above is an overview of the classic, standard negative pressure liposuction, which is a manual operation type of surgery. Since it is a manual operation, it cannot be separated from the laborious and inefficient operation, and the inconsistency and artificiality of the results. In today’s modern technology requirements, people can’t forget to realize the “mechanization” and “automation” of liposuction, such as the electronic liposuction and ultrasonic liposuction developed and launched in recent years. The criteria of mechanization and automation: first, labor-saving and efficient operation; second, high-quality and standardized results. Practice over the past few years has proved that electronic liposuction and ultrasonic liposuction cannot fully meet the above requirements. Electronic liposuction uses two needle electrodes with holes on the head side, one is positive for injecting anesthetic and the other is negative for sucking out the liquefied fat. Ultrasound liposuction uses the “cavitation effect” of ultrasound. The powerful ultrasound effect of radiation combined with the lower vibration frequency can easily form a large number of microcavities inside and outside the fat cells with low density and weak molecular adhesion, and the fat cells will be destroyed and liquefied by this “cavitation effect”, and will be squeezed out of the body through small incisions. For various reasons, electronic liposuction and ultrasonic liposuction have not yet been widely used; the classical negative pressure liposuction still has a broad market. As the research progresses, it is believed that more perfect and ideal methods will be developed and applied to play a role in shaping human beauty