Steel Surface Inspection System is an efficient automated surface inspection system primarily targeted for detection and classification of defects on a steel coil produced by a cold rolling mill. Solution can be customized for the coils manufactured in hot rolling mill. The state-of-the-art deep learning based system is capable of detecting multiple defect types simultaneously (The solution was Customized and deployed targeting more than 50 types of steel surface defect. The system is detecting defects in real time processing 20 M/Sec).