Along with the process of urbanization

the old-town renewal has become the top task in the city construction.Directed by quantitative analysis of city's economy

this paper puts forward a new conception and model of development capacity for old city renewal

established land class evaluation system and AHP model to determine the land class and its evaluation factors.Restricted by the old town's eco-environment and social environment

and targeted by its economy

this paper suggests that the upper limit model of the old city's development capacity should be decided by its eco-environment volume and social environment

and the lower limit model should be determined by the market economy

thus the renewal can see the economy

society and environment proceed orderly and harmoniously.Upon the platform of ARCGIS with considering Nanyang old town renewal planning and design

this paper has drawn a digital map for old town renewal development intensity

and explores tentatively the proper development capacity under the platform of GIS.