Quantitatine analysis and half-quantitatine analysis were carried out for the weathering velocity of the surface of the stone-carving of Nanxiangtang Grotto. Karstic dynamic erosive experiments on the samples of the stone-carving were performed in the simulation of acid rain, the erosive rate and depth calculated. To slow down the weathering velocity of the surface of carbonate stone-carved, not only the SO2, but also the CO2 in the industrial region in the air needs to be monitored. -- MCI