Based on the theory and method of the networks

this study explored the conversion models under different land-use types

identified the key land-use type

and analyzed the whole results of the conservation.Statistical indexes such as degree

betweenness and average path length were employed.The LUCC(land use/cover change)during the period from 1984to 2010in Xiaoqing River watershed were taken as a case study.The results indicated that farm land was the main land type that was converted from other land types

while the water land

wetland and construction land were the main land types that could be converted into the farm lands.The farm land was the key land type in the land type networks

by which the watershed LUCC was processed. The stabilization of land system was relative low

and this stabilization showed a decreasing trend.