A method for providing a product search result of a meta shopping mall comprises constructing a database by receiving store information and product information from servers for stores; receiving the store information and the product information from the stores, generating a store index document and a product index document including search words, and storing the store index document and the product index document on the database; generating keyword comprehensive information about a store which has registered a keyword, generating a keyword index document matching the keyword to the store which has registered the keyword, and storing the keyword index document on the database; receiving a search word input from a user; and searching the keyword index document within the database for the search word and providing the user with a store search result output interface for a product corresponding to the keyword.