This study examines the historical background of Goryeo and its relationship with Song and Yuan. In addition, it observes the shape of dress styles for the king, queen, officers, maids in waiting, and commoners after classifying them with a focus on the dress style of normal people appearing in Buddhist paintings. This study then investigates structures by tracing Goryeo`s unique identity and its characteristic by a comparison and analysis of dressing style elements of Goryeo with Song and Yuan. The results shows that the Song`s system was used exclusively for the dress style of the king and government officers of Goryeo after Goryeo`s submission period by Yuan. There were no clear appearances of a Mongol style dress but only changes in head styles of cutting hair around the head and twisting the rest in a top down and long method. In addition, Song`s style Bokgeon was shown by the king to his lower level officers. This was because the king and his officers of Yuan were in accordance with Song`s system in officer`s dress, hat and head style, armor, and horseback riding equipment. Second, there is doubt if they inherited a traditional form and style of the dress rather than followed the dress style of Yuan because the shape of Yuan`s basic dress style Deel is very similar to the dress shape of early Buyeo people`s Po in the 3rd to 4th centuries. Third, the shape of the Chaksu and Gung-go had been kept as it was in the dress style of ordinary men, and because the shape of the double collar had already appeared in the period of Samguk, which appeared in all classes of Yuan. There is no reason to adopt double collar shape that appeared. The general Pyeonbokpo of the country had to be influenced by Yuan. Forth, the dress style of queen and her maids in waiting were mentioned in documents; however, there was no shape of a dress like Boktag and Deel in the relics, which are the characteristic of Yuan`s woman dress style. Fifth, the shape worn national style Yu and Sang had been kept in an ordinary woman`s dress style; however, the two style system of high and lower class in Yuan`s ordinary woman dress style appeared newly and is considered an influence of Goryeo.