Anesthesia is indispensable for every surgical procedure, and it is always a headache for anesthesiologists whenever they encounter patients who weigh more than 100 kg or are short and fat, and for obese patients who want to lose weight, bariatric metabolic surgery must also go through anesthesia. For example, in epidural anesthesia, the patient may not be able to reach the epidural cavity due to the insufficient length of the puncture needle caused by the patient’s excessive obesity, and the problem that can be solved by half anesthesia can only be changed. If the patient needs to be treated under general anesthesia, the obesity factor may make intubation difficult. Problems such as these pose a lot of problems for anesthesiologists, and obesity has been identified as one of the risk factors for anesthesia complications. Therefore, when choosing a bariatric surgery center, obese patients must understand clearly whether the center is mature and professional. A mature bariatric surgery center, in addition to having a health management team to follow up each patient’s preoperative, intraoperative and postoperative tests, needs to be equipped with a perfect MDT multidisciplinary system, consisting of anesthesiology, ICU, endocrinology, respiratory medicine and psychology, to develop individualized treatment plans and Strict control of all aspects of surgery. In mature surgical centers, the safety of bariatric metabolic surgery is very high; the complication rate is 3.49%, which is lower than laparoscopic appendectomy and cholecystectomy. However, bariatric surgery is not for everyone. According to the Chinese Guidelines for the Surgical Treatment of Obesity (2007), bariatric surgery can be performed only for those who meet any of the first three of the following conditions and have the fourth condition: 1. BMI ≥ 32 kgm2 2, hyperlipidemia, etc., and the predicted weight loss is effective. 3. Waist circumference: ≥90cm for men and ≥85cm for women; dyslipidemia. 4. Other: no alcohol or drug dependence, no serious mental and intellectual impairment; other weight loss methods are ineffective or intolerable; 16-65 years old; understanding and acceptance of surgery and post-operative lifestyle changes.