A lack of systematic analysis of synthesized factors often leads to excessive land development intensity in different areas of the city, either too high or too low. Taking urban planning as the nature of public policy, this paper selects the efficient use of public resources as the positive factor, and the environmental constraints as the negative one. Then different factors were translated into corresponding mathematical model according to empirical studies. Finally, an integrated model on land development intensity was built through GIS platform, which will be beneficial to the benign development of urban land.