The aim of the study was to investigate the principal symptoms and a syndrome differentiation in the obesity using surveys from Oriental medical doctors and obese patients. Methods : Seventy three Oriental medical doctors who participated in the 2006 autumn annual conference of Korean Oriental Association for Study of Obesity and 243 obese patients responded to the survey. Results : Twenty nine percent of Oriental medical doctors replied that the syndrome differentiation is the most important diagnosis index, and 21 percent of them replied they use Sasang Constitution classification during diagnostic process. The syndrome differentiations used were mainly phlegm-fluid, blood stasis, spleen vacuity, food accumulation, damp phlegm, and Gi deficiency order. In the response of doctors and patients about principle symptoms of 6 syndrom differentiation belong inside 5 place except phlegm fluid and liver stasis Conclusions : We should develop syndrome differentiation questionnaire about obese symptoms.