How did the Korean religious culture which was consisted of three different religions- Shamanism, Buddhism, Confucianism- be combined and transformed? The author focused the mixture and transformation of the procedure of sacrificial rite and the arrangement of sacrificial food in each religion. In this thesis, the author studied first, the conception in sacrificial rite, second, the procedure of sacrificial rite, third, the items of sacrificial rite food according to each period. In consequence of the research each religion had lost its uniqueness and became mixed to each other and settled down in Korean culture.