The coastal region of southwestern Taiwan is the first developed area during the Holland period. And each of the settlements in this area have unique model of morphological organization due to the selecting of residential environments. Especially, the Jia-Ding area which located at the south exit of Er-Ren stream, which suffered environmental change, political transform and the force of planning during the past three hundred years and these factors lead Jia-Ding area to be syncretic into present plan and have losing the used morphological organization gradually. This research uses the methodology of field investigation, mapping and literature review to discuss the original model of Jia-Ding settlement. And it also shows the exchange of morphological structure after the environmental change. This research also refers to the contents of urban planning to describe the change of morphology in this settlement.
