1. An apparatus for detecting forgery/falsification of a homepage, comprising: a homepage image shot generation module for generating homepage image shots of an entire screen of an accessed homepage; a character string extraction module for extracting character strings from each homepage image shot using an Optical Character Recognition (OCR) technique; a character string comparison module for comparing each of the extracted character strings with character strings required for determination of homepage forgery/falsification thus determining whether the extracted character string is a normal character string or a falsified character string; a homepage falsification determination module for determining whether the corresponding homepage has been forged/falsified, based on results of the comparison by the character string comparison module; and a character string learning module for learning the character string extracted from the homepage image shot, based on results of the determination by the homepage falsification determination module, and classifying the character string as the normal character string or the falsified character string.