Two study were carried out to get basic data to improve the olfactory odor estimation method. The first study was to observe the odor intensity of reagents used to select the panel in Korea and Japan. And the second study was to compare the ratio of successful applicants of panel selection between Korea and Japan. As a results, it was observed that the average odor intensity of panel selection reagents in Korea is 3.8 degree and the one of Japan 1.8 degree. As the ratio of successful applicants of Japan method 88% is higher then the one of Korea mothed 30%, it was estimated that Korea method is more strict than Japan method.