Abstract: In this paper,three problems how to use the landsat image for compiling a map of land use of middle and small scale were expounded. (1) The appearence of land use type on landsat image is explainable,but it exists some problems such as information hiding,regional diversity or unstability.So the image interpratation is limited. (2) The classification system should be suitable for interpretable ability of the landsat images.The land use types of "area-form" can be directly abstracted from landsat image,and then the land use types of "point and line-form" can be picked up and other relative data can be used to consult and supplement. The classification system of land use can detailed into the second class or into the third class for individual type. (3) The paper deals with some unified contents and methods in the land use mapping with remote sensing.