Passive samplingion chromatography was used to monitor polluting gases, including acidic, basic and oxidizing gases, in Qin Emperor Terracotta Warriors and Horses site. The results were compared with active sampling method to test the effectiveness of ion chromatography with passive samplers. It is found that within a large concentration range and under a long period of sampling, the overall concentrations results of two sampling methods are comparable and consistent. Passive sampling techniques, therefore, could be applied to the monitoring of corrosive gases at museum sites.