The purpose of this study is to investigate the effects of the urban planning that has been developed in Buyeo since prehistoric times and its realization focusing on Baekje Sabi Capital Planning and Buyeo Land Readjustment Project. The results of this study were as follows; First, Buyeo is the important ancient city that was systematically planned and constructed on the basis of a definite principle in Baekje period. In addition, during the Japanese colonial period Land Readjustment Project specially took effect for building Shinto Shrine in Buyeo. Second, around the estimated area as Sabi palace, several roads have remained since being constructed in 1913. Besides, in Gua ri, Dongnam ri and Gugyo ri, the street network pattern of Buyeo Land Readjustment Project has rest since the Japanese colonial period. Third, depending on the timing of road-construction and lot-subdivision, the scale and characteristics of lots is different and they fall into three types. Fourth, the feature of architectures has relevance to the size and feature of lot.