In the paper,we propose a method for predicting the concentrations of particulates around airports based on the light-transmittance measurement.The mass concentration of particul ates is first derived in terms of the light transmittance.The derivation is further improved with the considerati on of relative humidity and emission components in the civil aviation applications.The prediction of the mass concent rations of particulates around airports is fulfilled through the classic fuzzy n eural network.The mass concentrations of particulates obtained by the proposed method are confirmed by the measured equivalents.The results demonstrate that our method is sufficient for accurately predicting the mass concentrations of particulates aro und airports.Our method is useful for investigating the variations of mass concentrations of particulates with diffe rent particulate sizes.