This study aims to reexamine the discussion of Korean contemporary art from the 1970s to the 1990s, focusing on “mediums” as a material practice. Since liberation from Japanese colonial rule, Korean art has unfolded dynamically while pursuing the continuation and development of values and traditions accepted from the West. Discussion on art is also not much different in that it was carried out centered on the discourse of identity based on the acceptance of Western culture or ethnic and nationalist ideology. However, it is questionable how faithful the writing of art history, which was based on genealogical or ideological concerns, was to the task of “what is art?” In this regard, it is an urgent task to find the possibility to read and describe Korean contemporary art in a new way. If we look into the practice of art from the point of view of mediums, we can confirm that while old and new media were mixed or collided with each other in each period, there were various emotional responses to objects and materials according to the conditions and environment of each period, such as cultural objects, industrial objects, natural objects or immaterial substances, body and actions, etc. By understanding the scope of mediums, it will be possible to open up new possibilities for getting one step closer to the artistic energy and values of Korean contemporary art.