PURPOSE : A method for searching information of a keyword reservation method using E-mail is provided to reduce a time for searching information and to transmit information rapidly.CONSTITUTION : If a person who wishes to buy real estate submits a special keyword(a means of transportation, commercial area, etc.) with a category as a kind and a cost range of real estate through an input form stored in an E-mail or a web site, a web server receives the input contents and stores the search category and the keyword in a database. If a person who wishes to sell real estate inputs and submits sailing information as a kind, a cost range, a commercial area, and a means of transportation, the web server receives the information and compares to a search category with a keyword list being stored in the database. If the contents are valid, the searched contents through a mail server are transmitted to the corresponding E-mail and the inputted contents are stored in the database.COPYRIGHT 2001 KIPO