Since its establishment in 1909, Hualien-gang Ting (Hualien Port) has had one hundred years of history. In the digital archives of maps during the Japanese Occupation Period, besides the construction of database for geographic names and administrative borders, much attention has also been paid to data on landform and land use, which are import to the studies of natural environment and social transformations. This study focuses on the Hualien River region in Hualien-gang Ting in eastern Taiwan, covering 28 fort maps of Hualien river region, not including the aboriginal area. It aims to construct the most complete contour landform numerical database in the recent one hundred years, conduct longitudinal environmental analysis on landslide disasters, and compare environmental factors on digital elevation, catchment types, and changes of river channels on the modern maps. This study can indirectly reflect the environmental stability that is difficult to measure, and expand the research and application of cartography in the research of humanity geographic information system.