Abstract: In this paper, Fujian Province was used as an example, the potential and state of ecological unit were introduced to analysis and forecast the changes of the land use structure, and the mathematical model of the niche expansion and compression degree of land-use types was constructed to elucidate the various types of ecological land-use changes in levels and trends. The analysis of annual horizontal and vertical niche to various land types were performed, and the change trends of the land use scale and its function in the whole land ecosystem were obtained, which were confirmed by the niche expansion or compression analysis results of land-use type. These data suggested that in the entire region, the amount of cultivated land and forest lands reduce more quickly than ever before; garden land and the construction lands will be greatly increased, the rate of infrastructure land increase will be faster. The point of view that the land use structure is unreasonable and it is necessary to establish the scientific development view and in a sustainable way was proposed.