Abstract: A device generates a database suited for maintenance of construction and civil engineering works, particularly very long and narrow bridges, roads, and slope faces. A device also displays the database. The database generator comprises a video camera which moves in the direction of the length of said object to successively capture images of an object, a position measuring unit which outputs data relating to the capturing position, a video recorder which records the output from said image input unit in synchronism with the positional information output from said position measuring unit, an image synthesis unit which, when the information recorded by said video recorder is reproduced, refers to said positional information and synthesizes the reproduced plurality of images into one image, and a memory for storing the synthesized image. The generated image database is posted on an Internet server and displayed via a browser.