Abstract: As the foundation of making sustainable development policy of agricultural and society, assessment of agricultural eco-environmental quality is a fuzzy conception. Combined with Feature Value of Grades for results quantification, applying Variable Fuzzy Set model on assessment could overcome the unfitness of the maximum membership principle. In this paper, the assessment of agricultural eco-environmental quality of Changshu city is supplied. Compared with the reference ［14］, the model is more suitable and the result is more objective. Based on the result, suggestions of agricultural eco-environmental quality maintenance for Changshu city are presented.