Abstract: Abstract: After pre-treatments with the maps from multiple sources by using geographic information system, the authors apply a new method to extracting urban boundary information and reconstructs the land using map of Guangzhou in 1907,1928 and 1968. Combining the materials in other literatures, it analyzes and summarizes the Space-time features of Land use/cover change in Guangzhou urban built-up area from 1907 to 1968. The results show that during 1907 to 1968, the main land used types in Guangzhou urban were the residential area, the industrial area, the water area, and the traffic land. The area change rate of land used type are fluctuate. During 1907 to 1928, the area of traffic land increased most. The area of the residential area, the industrial area and unutilized land increased dramatically from 1928 to 1968. During the 60 years, with the increasing of the built-up area, the river's length and the water area increased constantly, but the average width of the trunk stream of the Pearl River were gradually decreased .