1. Objects The objectives of this study were to examine the present state of Oriental clinical service based on Constitutional medicine and to make an accurate estimate of it’s scale after 10 years. 2. Methods The data for this study were collected from a questionnaire survey to 319 Traditional Korean Medical doctors who were selected as random samples. And this questionnaire is consist of several inquiries related with management and application of constitutional medicine. 3. Results and Conclusions The major results of this survey are following: l. The 52.8% facilities of all Oriental medical centers and Clinics in the whole country are applying Constitutional medicine for treating patients. 2. The 24.8% persons of all health workers are engaged in Constitutional clinical service. 3. The proportion of sales by Constitutional clinical services to the total sales by Traditional clinical service is 23.5% in 2005. 4. The proportion of application to medical care insurance by Constitutional clinical service is 17.9% of all amounts After taking these results into consideration, the sales of Constitutional clinical service now are estimated to make up 23.8% percent of the total traditional medical service and the amount of it’s sales after 10 years is expected to increase up to 3.6 times as much as the current quantity.