Abstract: The atmospheric corrosion behavior and law of bronze simulation materials exposed to museum simulation showcase were in situ monitored by quartz crystal microbalance (QCM). The corrosion products formed on surface of bronze simulation materials after 60 d were investigated by means of scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). The results showed that adding light, increasing humidity and temperature accelerated the corrosion of bronze. The most serious corrosion of quartz crystal was achieved when exposed to ERCO LED 4 000 K. After exposed to different lights for 60 d, the main corrosion products were Cu₂O, CuO, SnO, SnO₂ and the secondary corrosion products were copper carbonate, copper sulfate and copper sulfide, copper nitrate, copper nitrite and copper chloride.