1. An image processing device, comprising: an image input device for inputting image information; a control device for converting the image information into an electric file; a display device for displaying file name candidates; a selection device for specifying a file name candidate selected by a user from the file name candidates; a first storage device for storing an image data file; a second storage device for storing a first group formed of a plurality of first key data and a second group formed of a plurality of second key data; and an image analysis device for analyzing the image information to determine whether the image information is a text document or a photograph document, said control device eliminating the file name candidate with the key data having an identification mark “P” when the image analysis device determines that the image information is the text document, said control device eliminating the file name candidate with the key data having an identification mark “T” when the image analysis device determines that the image information is the photograph document, wherein said control device stores the image data file including the electrical file of the image information having the file name candidate specified by the selection device and assigned thereto in the first storage device, said control device associates each of the first key data with each of the second key data and attaches a serial number to generate the file name candidates.