KQ Agricultural Land Classification and Gradation Management Information System gives full consideration to the influence of light, temperature, water, soil and other natural properties of land towards agricultural lands as well as regional land utilization level and technological and socio-economic factors such as land economy input and output. Based on the natural, technological, social and economic factors mentioned above, this platform sets up quantified evaluation indicator to give a quantified classification index through comprehensive assessments and finally conducts gradation on the basis of the classification index. By classifying agricultural lands, scientific, legal and unified agricultural lands management can be realized, and by mastering the quantity and quality of agricultural lands, compensation standards for agricultural lands acquisition can be determined and rural land market can be developed. Agricultural land classification provides analysis and solutions for agricultural policies establishment, agricultural lands exploitation and arrangement, requisition-compensation balance of farmland and agricultural taxes reform etc.