Objective : The purpose of this study is to evaluate the effect of Yuebijiashu-tang with Low-Glycemic Diet on the obesity and to improve the oriental medical methods of treatment in obesity patients. Methods : Forty one patients were classified into four groups(Normal, Overweight, 1st Obesity, 2nd Obesity) by Body Mass Index(BMI). Weight, Body Fat Mass, Body Fat Rate, Waist Hip Rate, BMI and Obesity Index were compared in each group by t-test. Results : In distribution of sex, male was 7(17.1%), female was 34(82.9%). Mean age was 37${pm}$11 and the patients in twenties were the most. Among four groups, the number of 1st obesity groups was the most. In the change of body composition, the reduction of weight was 6.82${pm}$2.67kg, the reduction of body fat mass was 5.53${pm}$2.30kg, the reduction of BMI was $2.51{pm}0.85kg/m^2$, the reduction of body fat rate was 4.61${pm}$2.17%, the reduction of waist hip rate was 0.019${pm}$0.013. Conclusion : This study shows that Yu$'{e}$biji$~{a}$sh$`{u}$-t$~{a}$ng with low-glycemic diet is effective on weight reduction.