To easily process data for convenience at perusal time.

A source document M is read in by an image information read means 10 including a scanner device, page data files D by pages are generated, and an electronic bookbinding means 20 puts them together in one bound-book file F by giving successive page numbers. Bookmarks as titles of the respective pages are inputted from a bookmark input means 30 and key words of the respective pages are inputted from a key word input means 70 to generate data on a batch list GG. On the basis of the batch list GG, a bookmark adding means 40 generates a book-bounded file F* to which the bookmarks are added and a key word file generating means 80 generates a key word file K. A link file generating means 50 generates a link file L wherein specific bookmarks are made to correspond to specific pages. The respective files K, L, and F* are saved as an electronized document E on a recording medium by an electronized document saving means 60.