Abstract: The present invention provides a method for acquiring information on-line on customer preferences. The method includes joining or registering with an Internet-based advertising agency as a member thereof, collecting a profile of said member, collecting a preference of the member on the basis of the collected profile of said member, collecting the advertising effect on each member on the basis of said collected preference, analyzing said collected profile, collected preference and collected advertising effect and preparing a report on the basis of the result of said analysis and presenting it an advertising client member.