The present invention relates to a search engine that provides information on a predetermined website on the Internet. According to a preferred embodiment of the present invention, there is provided a method of managing websites registered in a search engine in a search engine administration system, comprising the steps of allowing a predetermined interface module to receive information on a website and allowing a website registration module to sort the received website information by the predetermined field and then to record the sorted information in a database means; extracting a HTML file constituting web pages of the website; detecting a predetermined function that generates a pop-up window by analyzing the extracted HTML file; increasing a predetermined counter value as much as a given value depending on the number of pop-up windows generated due to the detected function; determining whether the counter value exceeds a predetermined value; and if it is determined that the counter value exceeds the predetermined value, controlling a predetermined process to be performed for the registered website.