Abstract: An Internet contents providing service control method using a redirection technique and a control system therefor are provided. A redirection system is disposed between an intermediary's web server and a contents provider's web server. In response to a request from a user computer, the redirection system, instead of the intermediary web server, collects HTML documents provided by the contents provider web server, converts a relative path URL of contents (a variety of form tags, search CGI, images, icons, etc.) contained in the HTML documents into an absolute path URL, and when necessary, further executes additional conversion so that the HTML documents are reconstructed. In addition, the redirection system converts all form tags and hyperlink tags in the HTML documents so that the redirection agent of the redirection system is marked and then transmits to the user computer.