In this study, we developed a system that calculates the optimal evacuation routes to shelters by collecting detailed geographic information and analyzing the overlap between disaster risk/flood areas and road network data. Specifically, the system digitizes geographic information using geocoding technology and provides an intuitive visual display of the evacuation routes. In addition, the reliability of the system was enhanced through appropriate error handling and logging mechanisms. To evaluate the evacuation route optimization system developed in this study, we employed the System Usability Scale. The evaluation results demonstrated the system’s ease of use and the effectiveness of its design and layout.