This research aims to elucidate the irreversible deterioration mechanism of the CFRP-steel bonding system in atmospheric environment, using multi-scale characterization and interdisciplinary approaches. The experimental investigation will be conducted to clarify the influence of combined environmental parameters on the durability evolution of CFRP-steel joint systematically and quantitatively. Moreover, the accelerated deterioration effect of potential risks on system components will be demonstrated, which related to the material properties, corrosion resistance, and extreme environments.