This piece of research is a study of several components: there is the dissemination of Christianity within the Lanna areas of Northern Thailand, as well as that within Sipsong Panna, the relationship between the Christian communities of Chiang Rung with those of Northern Thailand in the capacity that they are both Tai Christians, and the critical study of Christianity in Sipsong Panna with emphasis on the Christian community in Chiang Rung. However, the result of this study finds that the establishment of the Christian community in Chiang Rung is an extension of the work of the lineage of Christians in the North of Thailand, as they would extend their missionary work from their own community of Tai people to other groups of Tai people internationally. The relationship between the Christian community in Northern Thailand with that of Chiang Rung is characterized as one of elder and younger siblings, as the Christian community of Chiang Rung will take both plans and support from the Christian community in Northern Thailand, in the aspects of management, personnel issues, the structure for work management, as well as the activities for social service. Aside from these, the people who accept Christianity in Chiang Rung, for the most part, are of a social class very similar to those who are Christian in Northern Thailand. As for the management of work and the governing of the Christian community in Chiang Rung, it is largely under the care of the of the Thai missionaries. Aside from the ease of communication in that they are Tai peoples, the dissemination of the religion has met success, for the most part, with people in the lower classes. In that the ruling classes of Tai Lue will not place great interest in the Christian religion, as they see Christianity as a religion of the minority groups, there is often a suppression of customs and cultures which differ from those of the majority (page 10).