Disclosed herein is a system and method for extracting users of similar interests between various types of web servers. The system includes a user profile vector creation unit, a user similarity calculation unit, and a similar user extraction unit. The user profile vector creation unit collects tag data, performs standardization calculation on the degree of importance of each of one or more tags, and creates user profile vectors for respective users. The user similarity calculation unit calculates user similarity using the user profile vectors of the respective users created through the user profile vector creation unit. The similar user extraction unit extracts users of similar interests using the value of the user similarity calculated through the user similarity calculation unit.