1. A system for extracting users of similar interests between various types of web servers, comprising: a user profile vector creation unit for collecting tag data, performing standardization calculation on a degree of importance of each of one or more tags, and creating user profile vectors for respective users; a user similarity calculation unit for calculating user similarity using the user profile vectors of the respective users created through the user profile vector creation unit; and a similar user extraction unit for extracting users of similar interests using a value of the user similarity calculated through the user similarity calculation unit.