Since the 1990s,a series of important achievements have been gained by utilizing Remote Sensing to research macro land cover and land use.The founded global and local land cover and land use database are being used widely,and have gained great social and economic benefits.The research results of land cover,land use,and their changes have been used to supervise the execution of international pact about global environmental changes.The method that utilizes RS technique to perform extensive detailed land investigations has gradually cast off the traditional concept that this work can only be used for mapping.It is now progressing along the direction of building an application oriented,synthetic database easy for user to perform.Moreover as to how to evaluate the precision of a land cover database of such a large scale has aroused widespread concern.As a follow up,a number of new theories and methodologies came into being accordingly.Upon entering the 21st century,it is expected that the RS research about global and local land cover and land use will gain even greater progress.