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In order to understand present status of island exploitation degree, and to make a reasonable development plan for future exploitation, this paper proposes multi-scale analysis evaluation model to achieve the goal. With the new proposed model and SPOT-5 image in 2003, the island exploitation degree of Daxie Island is evaluated. According to the comparison between in the same period land use classification and results of island exploitation degree, the proposed model is reasonable and valuable in dynamic evaluation of island exploitation degree.