With the rapid development of national economy, requirement of people for natural resources and the environment has been increasingly expanded. Thus, timely, exact and dynamic information of resource state and its dynamics is vital to the conservation of resources, protection of the environment and sustainable development. This paper gives an overview of the concepts, characteristics of 3S technologies, i.e., remote sensing (RS), Geographic Information System (GIS) and Global Positioning System (GPS); application of 3S technologies in landscape ecology, landscape heterogeneity research and spatial pattern analysis and simulation. Future advance of the application of 3S technologies in community ecology, vegetation survey, biodiversity research, vegetation mapping and many other ecological fields are also discusses in this paper.
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