英文摘要:This study, based on data collected in the I-lan plain, deals with the Hakkas’ belief of The Three Mountain Kings and its changes as well as the related ethnic relationships. The Hakka, as a minority group coming to Taiwan later in comparison with the Hokien, could not but migrate to and settle down in mountainous areas instead of plain. Therefore, they must face a serious situation in confrontation with the aborigines. In there belief system, The Three Mountain Kings had already become their most important Tutelary God. For fighting the aborigines, the Hakka had to cooperate with the Hokien, so the frontier or ethnic demarcation between these two groups became vanished and the Hakkas’ Tutelary God, The Three Mountain Kings, had been accepted by all the Chinese immigrants as a whole in the I-lan area.