This article dealt with the Byeolgieun(別祈恩)’s ritual aspect that was practiced in the whole Goryeo Dynasty. Byeolgieun was a ritual ceremony held by government and royal family in the various Gibokcheo(祈福處;a place for invoking a blessing) such as the palace, temple, mountains, rivers, and shrines etc. As Byeolgieun was the ritual representing the Goryeo Dynasty, which recognized the existence of various divinities, Byeolgieun was performed on the basis of several ideological grounds throughout the Goryeo Dynasty. According to the flow of time, it showed each ideological tone depth progressed and so Byeolgieun’s Buddhistic·Taoistic ceremony shaped in the early, middle Goryeo period, while Shamanistic tendency was stronger in the Late Goryeo period. There seems that the first Byeolgieun recording can be discovered in Byeolryegije(別例祈祭) of SImu 28, Choe Seung Ro(崔承老)’s Sangsomun(上疏文) when King Seongjong(成宗) period. Byeolgieun had already an established interpretation, that is “Eumsa(淫祀)”, means different from ritual processes and rites. But it could figure out that rites aspect regarding to the early Goryeo period Byeolgieun through trying to a new interpretation of exceptional rites such as Byeolryeyeondeunghoe(別例燃燈會)·Teukseolinwanghoe(特設仁王會). Hereafter under the unstable domestic and international conditions, Byeolgieun, which was gradually becoming more formationed and prevailed as national ritual after the establishment of a national organization related to ritual practice, GIeunsaek(祈恩色)·Byeolryegieundogam(別例祈恩都監), then from the word “Byeolgieun” being called to Gieun (contracted form) started to expand, not only in the capital town and palace but conducted ceremony in local area. As entered Yuan(元) intervention period, through the dispatch of those who are in charge the officer, Oesangieunbyoelgam(外山祈恩別監) and Gieunsa(祈恩使), Byeolgieun started to be performed in local Myeongsan(名山;authorized mountains) and temples. Oesanjegosa(外山祭告使), who performed confucianstic Sancheonje(山川祭;rites of authorized mountains and rivers), concurrently served as Oesangieunbyoelgam. When they went to the local Myeongsan for performing rites, they conveyed a decree of amnesty of the king to the local prisoners and they did lots of bad activities by using the high position as national rites officials. These Sancheonje style of Byeolgieun, Oesangieunbyoelgam conducts in the temple of the Myeongsan, can regard as the transition period before type was fixed from Buddhistic·Taoistic ceremony to Shamanistic ceremony in the Late Goryeo period. From the early 13th century, gradually appearing the Mudang(巫堂;shaman)’s ceremony much more prevailed by shamanistic trend since Yuan intervention period. In the Late Goryeo period, Mudangs participated in the politic issues directly or indirectly and using these current situation, Mudangs’ descendants and relatives took the higher status. Therefore Mudangs’ positions were much higher and Byeolgieun was fixed Shamanistic ceremony. Because Mudangs, who charged in GiuJe(祈雨祭;ritual for rain) and several private rituals in and out of the royal family, conducted the national rituals much more than ever, preventing Shamanism theory appeared. And In this circumstance, in order to distinguish “Gieun” in the previous system and separate Shamaniistic ritual formation, “Byeol” was added again then named “Byeolgieun”. Confucian scholars’ intense criticism against Shamanistic Byeolgieun, carried over Joseon, continued. Moreover several Confucian transformation made an attempt, but still remained Shamanistic ceremony.