This article was intended to compare the ‘One Dupyo’ in a historical record with his character in a fictional narrative which is based on history looking at the record of The Annals of the Choson Dynasty for ‘One Dupyo’ and the various stories to be introduced about ‘One Dupyo’. For this purpose, in the second chapter of this article, I organized how ‘One Dupyo’ was described in historical record reviewing the text of The Annals of the Choson Dynasty and the obituary of ‘One Dupyo’. Thus, although ‘One Dupyo’ has been trusted by kings, I could see that he was a man who received negative reviews from the other vassal. The excellent fearless vigor and cleverness which ‘One Dupyo’ had, it work as a merit for his success in the rebellion, but it was a hindrance to an official life. And in the third chapter, I suggested how ‘One Dupyo’ was shaped in the story on the basis of the oral folktale about ‘One Dupyo’. Also, I examined the ‘Silgi’ for ‘One Dupyo’ and the contents of historical novel in this discussion. Through this discussion, I could tell that the character of ‘One Dupyo’, who is being repeatedly produced in the data of the oral folktale, the historical novel, ‘Silgi’, is the hero who has to overcome difficulty. Especially, ‘One Dupyo’ in sad days of the absence of a powerful hero in Japanese occupation is shaped like an extraordinary hero. But, ‘One Dupyo’ in the oral folktale, his character is limited to those who advance to the government post and always on the road using his fearless vigor and cleverness. It also overlaps with historical evaluations. In that point, the main story of the ‘One Dupyo’ is the form of the oral folktale, the special title he had was to be glorified as a positive advantage according to the demands of the times, and to be criticized for its shortcomings.