In the late nineteenth century, numerous western missionaries, following the ports opened to trade, came to Formosa to preach. The missionaries came across serious protests or even conflicts when the location they chose to build a church or facilities considered by the local people as blocking the directions of the residence and graves or the Feng-shui dragon veins of the area. This paper tries to investigate, through the books and documents of the missionaries, their attitudes toward Feng-shui taboos and how they coped with the request to ”do as the Romans do.” I wish to demonstrate the disparity or even conflicts between the cultures of foreign religion and folk custom in the late-Qing Taiwan, when religious clashes were often seen.