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Fugitive dust dispersion was studies in Saemangeum reclaimed land which developed 40,100 ha and located at the west coastal part of Korea. The salty dusts can affect to nearby farms. A computational fluid dynamics (CFD) model was developed to predict the dispersion of fugitive dust considering the topography of the area. Results showed that the dust concentrations are highly connected with the changes of dust source area. The dust concentration has been decreased from 2006 to 2010, and it is expected to decrease further as more dust source areas are being covered by plants. Dust dispersion ranges of CFD result were compared with that of field experiment at the same measuring points for the CFD validity, and the results at stable weather condition were very acceptable with a 6.8% error. On the basis of 10 m particle size, the dispersion distance of fugitive dust resulted in about 2,500m with the wind velocity of 5.0m/s.