Obesity: A chronic disease caused by excess fat storage that can damage health. There is a potentially fatal risk and its causes are diverse and include genetic, environmental, psychological and physical factors. Obesity is a major public health problem worldwide, and it is estimated that 300 million people worldwide are currently suffering from obesity. Statistics in Europe show that about 135 million people suffer from obesity (BMI >30), 24% of children are overweight, and the number of overweight and obese people in most European countries has increased by 10-40% in the last 10 years. Obesity is closely related to many medical diseases: studies show that obesity significantly increases the incidence of type II diabetes, dyslipidemia, metabolic syndrome, gallbladder disease, dyspnea, obstructive sleep apnea and other diseases, as well as coronary heart disease, osteoarthritis (knee, hip), hyperuricemia/ventilation, hypertension, cancer (endometrial cancer, postmenopausal breast cancer), abnormal secretion of sex hormones, polycystic ovary syndrome, infertility. Ovarian syndrome, infertility, low back pain, increased risk of anesthesia, fetal malformations in obese mothers, and other diseases. Obesity seriously affects health and quality of life and shortens life expectancy, and when body mass index increases, the chances of dying from obesity-related diseases increase significantly. In Europe, where 320,000 people die each year from diseases directly related to obesity, obesity can worsen health, reduce quality of life and shorten life expectancy. Recent research findings have found that adult obesity causes one or more diseases directly related to life expectancy and shortens life expectancy by approximately 7 years in both men and women. Obesity is second only to smoking as a preventable cause of death. Obesity will also affect the quality of life of patients: 1, social impact: because of the weight of the harassment and prejudice increased; research shows that society does not have enough respect for obese people; similar to alcohol and drug addicts, the number of friends of obese people is often less; the opportunity for love and marriage is greatly reduced. 2, psychological impact: the chance of major mental illness is more than the general population; the phenomenon of impaired self-esteem increases; depression is widespread. 3, physical impact: smaller range of clothing choices; increased difficulty in tying shoelaces; reduced adaptability to various appliances (such as seats in cinemas, airplanes, buses, seats in restaurants, kiosks and cabinets in toilets and bathrooms) and personal hygiene (reachable range is restricted). 4, economic impact: unequal treatment of occupations (reduced employment opportunities, promotion difficulties, special programs or account number increase) and unequal treatment of education (school and university choice). The treatment of obesity disease mainly includes surgery and non-surgical treatment. Non-surgical treatment includes diet control, physical activity and medication. Studies have shown that within five years after diet control treatment, most patients regain even more weight than they once lost. Medications have little effect and have high side effects, and are not recommended for weight loss. Exercise weight loss is often declared a failure due to the patient’s inability to adhere to it over time. Non-surgical treatment is effective in only 1 in 20 patients with obesity; studies have shown a 97% treatment failure rate within 5 years of non-surgical treatment for each obese individual provided with medical treatment. Surgical treatment is the only long-term effective treatment available to significantly reduce weight, improve or cure obesity complications, and improve the patient’s quality of life. The benefits of surgical weight loss are numerous and include a significant reduction in mortality, improved self-esteem and mood, increased effectiveness in interacting with people, improved quality of life, reduced low self-esteem, weakened sense of self, increased interest in activities such as socializing and traveling, and increased happiness in marital life. Currently, the main surgical weight loss options are adjustable gastric banding, gastric sleeve resection and gastric bypass. Patients with BMI ≥ 35, BMI ≥ 30 with obesity-related diseases, and those for whom other weight loss procedures have failed are suitable candidates for surgical procedures. and are willing to have long-term follow-up treatment and extensive diet, exercise and other medical guidance.