Abstract: The method of the present invention comprises the steps of: outputting the content of the advertisement when the user clicks the advertisement and simultaneously providing the user with a telephone number input window for enabling the user to input the telephone number thereof and the telephone number of a person to be called; connecting a call between the user and the person to be called via a public switched telephone network regardless of whether or not the user has opted for membership when the telephone numbers are input to the input window and a request for connection is made; and enabling the user to talk to the person over the phone for free when the call connection is made in exchange for watching the advertisement.