In order to cope with the increasing number of aging social infrastructures, an efficient inspection system utilizing 3D data is required. In particular, since deformation of bridges does not occur in a short period of time, it is necessary to predict the progress of deterioration on the cyber before large-scale deformation occurs, and to develop repair and reinforcement measures. In addition, most inspection work is performed visually by engineers. Therefore, the results are likely to vary from person to person, and there is a possibility that a damaged part may be overlooked. Therefore, criteria should be established to accurately determine whether the deterioration and damage detected is hazardous or progressive. This study aims to create and apply a digital twin model that tracks mechanical behavior and simulates the progression of deterioration in order to accurately estimate and manage the condition of bridges on the cyber environment. Finite element analysis was selected as the research method. A finite element analysis model was created using the analysis software “MSC Marc” for a standard-size road bridge. The deformation of the entire bridge was observed by loading the entire deck slab. In addition, several cases were set up in which a portion of the bearings had been subjected to corrosion deterioration, and the mechanical response was compared with that of the healthy bridge. As a result, the vertical displacement of the girder and the stress distribution at the girder ends were reproduced on the cyber. The differences in behavior between the healthy and corroded cases were also observed. This time, a bridge model was created and analyzed using FEM analysis software. In the future, we aim to utilize 3D drawing data created with CAD software by loading them into analysis software. By building a system in which drawing data is compatible with each other and all software is linked to each other, it is expected that information on maintenance and management will be managed in a unified manner.