This paper defines the intensity, intensity benefit of land use and its calculating method, and presents four different typical pattern that describe the condition of land use in a region. Based on which, an intensity estimation and pattern classification model of land use is established, and a method of pattern recognition and state monitor of land use is developed. According to this new method, the benefit analysis of land use can be combined with the harm in land ecosystem, and the strength acted on land ecosystem by regional economy development can been evaluated．Finally，an example is introduced to illustrate the above results．It is useful to make good use of land resource and coordinate the development of．society，economy and ecological environment．