Objectives: The purpose of this study is to evaluate the effect of treatment in obesity clinic in east-west collaboration center, furthermore to search for how to join and improve east medicine and west medicine more closely. Methods: 37 patients were classified into four groups by Body Mass Index(BMI); normal, overweight, 1st obesity and 2nd obesity groups. Weight, BMI, body fat rate and abdominal fat rate were compared in each group by paired t-test. Results & Conclusions: In distribution of sex, male were 10(27%), female were 27(73%). Mean age was 34±13 and the patients in twenties were the most. Among four groups, the number of 2nd obesity groups was the most. Most patients had a preferance for western medication and ear acupunture therapy. In general we could find the correlation between the effect of obesity treatment and the degree of obesity. The more the obesity degree was, the more weight loss was.