In the oral literature of the Mongolians such as folk-tales, legend, epics, poetry, songs, riddles etc., there are endless examples describing various stories about the origin of the costumes, ornaments and accessories, or the way how they were designed and changed with the times and how they correspond with relevant customs, public rituals and etiquette in general. In this paper we argue that every piece of the Mongolian national costumes and wear in general has specific meaning and symbolism, which is still the miraculous universe waiting to be unveiled properly. As for the Mongolians, the costumes and accessories mean the treasury of intellectual culture of their own as well as their daily necessities of life. There are still many undiscovered features of ancient national culture, apart from characteristics of various tribes and clans of the Mongolians.