This study aims to develop an odor intensity reference scale appropriate to the characteristics of Koreans, based on ASTM E544-99. The Odor Intensity Reference Scale of the United States utilized to make up for the absolute index of odor intensity. The concentrations of n-butanol, which is equivalent to the 5th stage of odor intensity in Korea, are proposed to be 100, 400, 1500, 7000, and 30000 ppm, respectively. Based on the ASTM E544-9 method, the reference scales of Korea odor intensity were compared and the result showed that the reproducibility and practicability of the method were satisfactory. it is therefore suggested that n-Butanol, which is processed with the proposed concentration levels as the absolute standards for odor intensity, can be used as Korea Odor Intensity Reference Scale for the experiment of panel screening test in an air dilution olfactory method.