West Japan Railway Company is working on the development of a bridge maintenance management system that enables it to accumulate chronological data and calculate the exact quantities of deteriorations and repairs using photographs and 3D models. It is aimed at constructing a base system that enables the maintenance cycle to be operated successively. The developed system encompasses three major functions: 1) effectively generate 3D bridge models of various structure types; 2) associate photographs acquired by digital camera to 3D models; 3) calculate and report quantities of deteriorations and repairs. Regarding the first function, representative bridge structure types are listed, and selecting a template model and entering the length of each component can generate 3D models of these types. Complex structure models can be generated by importing 3D CAD data. Regarding the second function, photographs can be placed onto 3D space conveniently by referring to position information obtained during the taking of photographs. When a tablet computer with a tilt sensor is used for photographing, the tilt angles of photographs are also referenced. In addition, it is possible to precisely replace a photograph, by entering characteristic points that correspond to the edge of a component, between a digital camera image and a 3D model. Regarding the third function, by drawing the shape of a deteriorated and repaired part, which has a unique ID on a photograph, the part can be represented on a 3D model. This is possible because photographs in 3D space have position coordinates. Consequently, it is possible not only to calculate the exact quantities of deteriorations and repairs but also to chronologically track the changes in a deteriorated part.