This paper examines the formation and structure of dance music and the relationship between dance and music in order to better understand Kim Chi-hong's style of the twelve-forms Janggo dance. Literature review and oral history research are employed as research methods, and the musical characteristics of sound sources and videos are analyzed using a characteristic decomposition method. The results of the study can be summarized in three points. First, this article revealed that the music of the dance was a Seodo folk song written at the end of the nineteenth and beginning of the twentieth centuries. There is a greater possibility of the twelve-forms Janggo dance and its music interacting during the period. Second, the rhythm of the twelve-forms Janggo dance changes from Jungmori (♩ =65), to Gutgeori (♩ =40), and then to Jajinmori (♩ =70-95) rhythm. Third, music was transmitted along with dance. The process of transferring the twelve-forms Janggo dance is closely related to lyrics, the melody, and the rhythm of “Ginnanbongga”, “Cheongchunga”, and “Hangang-soo taryeong”. This research is important because it indicates that the musical structure and formation of this dance contributed to the transmission and creation of the dance itself.