Since the beginning of converting farmland to forest or grassland, fewer researches have been done to evaluate the comprehensive efficiency of converting farmland to forest or grassland in a region.Starting wit h an explanation for the necessity of indicator and using a theoretical approach, the authors try to find a set of scientific indicators for converting farmland to forest or grassland in a region.The indicators can be easily mani pulated by technical staff, and hopefully, the results can be used pragmatically and completed gradually.