To effectively analyze Web page/Web site when the number of viewers of the Web page/Web site to be analyzed is small, and to effectively analyze potential viewers having a high possibility of viewing the Web page/Web site to be analyzed in the future.

This Web viewer analysis system 1 is provided with a relevant information acquiring means 4 for acquiring relevant information 3 including the designation of at least one Web page/Web site related to the Web page/Web site being the analysis object, a viewer information acquiring means 6 for acquiring viewer information 7 about the Web page/Web site designated by the relevant information 3 acquired by the means 4, and an analysis processing means 9 for carrying out analysis processing on the basis of the information 7 acquired by the means 6 and making the analysis processing results to be evaluation information about the Web page/Web site to be analyzed.