Abstract: A method of displaying text of an electronic document on a screen of an information terminal is proposed. The method includes: selecting a specific electronic document by a user; assigning new tags to all text of a corresponding electronic document selected by the user in units of words or letters so as to objectify the text; designating one page of text displayed on a screen of the information terminal by calculating a last word or a last letter at the bottom of that screen that may be displayed on a screen of the information terminal to the extent of not infringing the copyright of the electronic document; and selecting and performing a sequential display mode, a sequential disappearance mode, and an emphasis part designation mode, thereby allowing rapid reading training and enabling quicker review/revision of the parts that have already been studied and understood by a learner.