1. A target advertising system comprising: a user profile database configured to store browser-login mapping information in a database, the browser-login mapping information being generated by mapping browser cookie information and login cookie information, the browser cookie information including identification of a browser and the login cookie information including user profile information of a user; an advertisement server configured to read browser cookie information of a web browser, the web browser accessing the advertisement server, the advertisement server transferring the read browser cookie information to a user behavior server; and the user behavior server configured to retrieve browser-login mapping information associated with the browser cookie information from the database, to identify user profile information based upon the retrieved browser-login mapping information, and to transfer the identified user profile information to the advertisement server, wherein the advertisement server displays advertisement data associated with the user profile information on a web page.