1. An image processing apparatus including a Web browser, capable of obtaining Web page information through a network comprising: a scanner for obtaining document images by reading out each of a plurality of documents on which text including a Web address is indicated, a first extraction unit for extracting said text from said document images, a second extraction unit for extracting said Web address from said text, a fetch unit for fetching Web page information corresponding to each said Web address utilizing said Web browser, a first generation unit for generating one concatenated image by concatenating said document images and an image indicated by said Web page information, and a second generation unit for generating an index indicating a corresponding relationship between said document images and said Web page information in said concatenated image.