According to the visibility of regional culture in city architectural planning and design, combining with the visual system of metabolic network in the chemical reactions of biological, a digital oriented model is presented, and the regional culture of city construction planning is as the visual target. The general topology information can adjust some concrete parameters, to improve the quality of the visual layout. In addition, because metabolic networks have the scale-free network characteristics, we is according to the scale-free characteristic of metabolic networks in the visual effect, we propose an optimization system for hub node, making the more prominent visual effect of the regional culture.