Information abstract system for web site and advertising method using information abstract system

A web-based information extracting system and an AD method using the same are provided to connect an EC(Electronic Commerce) mall by extracting information from a database when a search engine is started in a client and displaying the extracted information to a window exposed when a mouse pointer is pointed to a natural language result text offered as a search result. A search linker(16) is provided from a control server(10), is installed to a user browser(12), and extracts data from the database(14) connected with the control server according to a natural language query of the search engine by being started with starting of the search engine at the same time. A connection linker(20) hides the search result received from the search linker to the user browser, provides a mouse-over window(18), and connects a site when the search result displayed to the mouse-over window is clicked. The mouse-over window exposes the search result to the user browser by using a condition for clicking natural language displayed to a search result window as the search result of the search engine.