Currently, KDA adopted new post-graduated program; advanced education general dentistry(AGD) for 3 years preparation. The AGO program provides the resident the opportunity to deliver the highest quality of comprehensive dental care to the broadest range of the population with a knowledge, comfort, and ease in treating the high risk patient. The purpose of this article is to study the assurance systems of AGO programs in USA and Japan and to suggest a piece of advice whether we choose the way of AGO program assurance system in Korea.