The method of evaluation of inspection on concrete surface and detailed inspection is presented for three purposes as follows. The first objective is quantification of steel corrosion grades and conditions of concrete surface, the second one is prediction of steel corrosion grades and conditions of concrete surface due to cover, carbonation depth and chloride content on steel surface, and the third one is revision of prediction results with concrete surface conditions. This thesis shows prediction method of concrete surface condition based on prediction of steel corrosion grade with use of correlation model between corrosion grades and concrete surface conditions, and revision method of prediction with use of inspection result of concrete surface by adjusting carbonation speed factor, cover depth, chloride ion content on concrete surface and chloride ion diffusion coefficient for coordination of prediction result to inspection result.