The oral literature is generally regarded as the mirror of one nation`s mentality, identity, mental world and cultural horizon and, simultaneously, it has also an important role instead of the history before the documentary literature. Especially, the field of oral tales among the various genres of the oral literature is considered one of the literary branches which comes easily in contact with people and is transmitted from generation to generation for a long time. If the oral verses were transmitted and spreaded by old musicians or traders, the oral proses(tales) come close to the masses through the intermediation of the storytellers. The legends and myths as subordinate positions of oral tales occupy generally limited spaces, nations or same language areas. Contrary to the legend or myth, we can meet frequently folk-tales (fairy tales, narratives or even epos) which have same themes or subjects under similar functions and structures between different tribes or nations. If the individuality of each folk-tales which have common consciousness and factor is due to the pluralistic evolution (development) theory, their universality could be fundamentally attributable to the result of transmission and diffusion. We come easily in contact with many similar kinds of oral literary works in aspects of subjects, themes, senses, motives, structures, forms etc. in the east-north Asian states, not to mention many countries of the East and the West. This phenomenon will be understood through the peculiar universality and the reciprocal influences of the oral narrations, folklore outputs and their texts. We can find some similar subjects, themes, motives, functions and structures of Korean oral literary works also in the Romanian oral literary works. In this paper I selected each three folk-tales of Korea and Romania as comparative cases. As for the methodology I referred to the Aarne-Thompson`s classification and V. Propp`s morphology of the folk-tale. This attempt of comparative studies will have a critical and important significance to observe the universality and individuality of both countries` oral literature which have different languages and cultures. Moreover, this will also represent a valuable experiment to observe the possibility of the limitation and the overcoming of the comparative studies not only between Korea and Romania but also in addition between the East and the West.