The 29th European Congress on Obesity(ECO) was held in Maastricht, Netherlands from May 4 to May 7, 2022. The conference consisted of five sections with a great amount of information: basic science, behavioural and public health, childhood and adolescent obesity, management and intervention, and metabolic surgery, with a total of more than 80 special reports. We summarized the epidemiological investigation, diagnosis, complications and management of obesity, aiming to provide reference information for the comprehensive management of obesity in China.