This study developed a steel corrosion monitoring system using a magnetostrictive vibration power generation device that converts energy from bridge vibration or wind vibration into electric power for deteriorated bridges due to chloride attack. In addition, as an application of this monitoring system, an analytical model was constructed by linking the monitoring results with a three-dimensional finite element analysis. And the residual load capacity was evaluated. Furthermore, this study linked the existing database system with real-time viewing of monitoring data.