Taking Qingzhou City as our study area, which is an experimental unit of Ministry of Agriculture, this paper intends to research for quantitative methods for cultivated land fertility evaluation. Based on the plentiful information that obtained by remote sensing technique, field-survey and lab analysis, the automatic and quantitative evaluation procedure was realized by adopting various mathematical models and methods such as system-cluster, Analytical Hierarchy Program, fuzzy math, etc. and supported by GIS techniques. The area and spatial distribution information of cultivated land fertility were acquired, and the results were consistent with local conditions according to field survey and analysis. The approach was feasible and effective in cultivated land fertility assessment. This research contributes significantly to scientific management and sustainable use of cultivated land resources.