A method of determining an intention of internet user, and a method of advertising via internet by using the determining method and a system thereof

The present invention relates to a method and system wherein a user's field of interest, i.e., the user's access intention is known using the Internet and the results are applied to predetermined fields. More particularly, the present invention relates to a method and system wherein an event input by an Internet user is analyzed to understand the type of information desired by the user, and the results are used to determine the user's access intention in order to provide specific advertisements or other information to the user. An advertising method via the Internet according to an embodiment of the present invention comprises the steps of receiving an event from a user; classifying the event according to a predetermined category; recording the event as a history file; determining whether the input event represents the user's field of interest based on a predetermined reference by analyzing the history file; recoding the event that is determined to represent the user's field of interest as an advertisement file; and if the user accesses the Internet, providing advertisements associated with the advertisement file to the user. Preferably, the history file and the advertisement file may be a cookie file.