The purpose of This study is to explain what is the core story of by Kim Jong-jik and it`s functionalities, although the rich and powerful period of the Silla Dynasty was the periods after the unification of three nations, he figured the former period in . First of all, it supplemented mutually In case of describe the historical facts and poem separately in by doing deliver atmosphere and emotions when historical events happened more effectively. It is also making instructive intention can be delivered to reader exactly and burningly by reappearing Shilla ; Dongdo(東都), through harmony of various method and form of description. And Kim Jong-jik who was choosen the areas that focused on Shilla, especially Dongdo, and the historical facts that correspond closely with Confucian instruction, was reappearing Dongdo by choosing the main character to the upper class ; nobility, who were lead the nation. This were materializing effort of subjects to embody the ideal world. But People lived very painfully due to natural disasters and the violent of corrupt officials in Yeoegnam area(嶺南) at his time. So he appreciated as important selecting government official and the role of scholars for improving of the very poor reality in Yeoegnam area. Therefore, his positive awareness of the Dongdo was function to the opposite clause criticizing the very poor reality in Yeoegnam area and to the critical mechanism criticizing the reality of the positive. And it was functioned the justification to strengthen of the control of Confucian scholar for the country. In these meaning, was the work that Kim Jong-jik`s ideal to embody the ideal world to realise the principles of royalty was expressed.