The purpose of this research are to identify the nature of artistic beauty of Kokuryeo dresses and to apply the artistic beauty, formative uniqueness, and esthetic value of Kokuryeo in the modern Korean dress design for creation of new designs. Significance of this research lies in the fact that beauty of traditional dresses possesses highly valuable importance for application to modern fashion design processes. Kokuryeo dresses basically comprised of Yu, Sang, Go and Po, and contains within abstract beauty along with emphasis on geometric elements like dots, lines, and surfaces. Red, Black, Violet, Verdant and scarlet colors were moderately used against the mainly white canvas, and different colors were often used for the top and the bottom. Silk, Hemp cloth and Wool were used for different social levels or ranks, and from the wide variety of colors and patterns of the dresses, such as Round-patterns, Cloud-patterns and Vine-patterns, worn by the people illustrated on the wall paintings, it appears that various materials were used. Vertical hems, Yu (shirts), Sang (skirts), noblemen's dresses, kings' dresses, etc. from Kokuryeo tomb wall paintings were applied, and various dying methods, natural materials and sewing methods were used to recreate the unique features of Kokuryeo dresses in modern designs in an attempt to recreate the esthetic value of Kokuryeo dresses.