This study is to find out the process of changes concerning the cadastral records that consist of the cadastre, the cadastral map and various registers of land in Japanese Colonial Period. The cadastre and cadastral map were the most important part of them and became the basis of cadastral records. These two registers were first made out according to the Project of Colonial Land Survey in the year 1912. As the influx of foreign Weights and Measures was greatly influenced by the foreign concession since 1876, the traditional units of the Weights and Measures had abolished finally. The extortion of sovereignty led a rapid change to the Weights and Measures in 1910. Japan compelled us to change into Japanese System of Measurement. From that time on, Lot(筆地) and Pyeong(坪) were settled down on the registers of land.