The indoor accelerated corrosion of 09CuPCrNi weathering steel in simulated industrial atmosphere was investigated by the corrosion weight-loss method, field emission scanning electron microscopy (FE-SEM), x-ray diffraction (XRD), and Raman spectroscopy. The results indicated that the indoor accelerated corrosion kinetics of 09CuPCrNi weathering steel could be divided into two stages with different log (thickness loss, D)-log (time, t) fitting functions. The second stage of corrosion corresponded to the protective rust layer that formed. Three correlation models involving atmospheric corrosion and accelerated indoor corrosion were developed based on the kinetic model of the second stage of the accelerated indoor corrosion. Those three models corresponded to three atmospheric corrosion stations located in Beijing, Jiangjin, and Guangzhou (China), respectively. This indoor accelerated method presented a better accelerated effect for Beijing atmospheric environment.