System and method for offering information using a search engine

PURPOSE: A system and a method for offering information using a searching engine are provided to offer the searching information classified into various standards to a user by searching/offering a document optimized to a user's purpose, and securing the searching result information of high quality as extracting the needed contents from the web document of many information source site. CONSTITUTION: A document extracting module(220) reads/extracts the contents of the document in a block unit by receiving the document obtained from an information obtaining module(210), and stores it in a database(300). A morpheme analyzing module(230) analyzes/indexes the morpheme by selecting the contents fit to a query word from the extracted contents, and generates the second file storing a morpheme analysis result by a term frequency and the third file according to the morpheme analysis result. A reverse-file generating module(240) generates the first file based on the second and the third file. A sorting module(250) carries out sorting based on the first file and a term frequency of the query word.