A method and a system for filtering spam short messages

PURPOSE: A method for filtering a short message and a system therefor are provided to selectively receive the short message by providing an opt-in/opt-out type reception approval/rejection function with respect to the certain short message. CONSTITUTION: A certain short message including caller information is received from a caller(S320). A reception approval/rejection registration list corresponding to caller information included in the short message is retrieved with reference to a short message filtering database(S330). If caller information is not included in reception approval/rejection registration list information stored in the short message filtering database, a short message reception confirmation request including caller information of the short message is transmitted to a mobile communication terminal of a user(S350). A reception request response of the short message with respect to the short message reception confirmation request is received from the mobile communication terminal of the user(S360). The short message and a reception approval/rejection setup registration message are transmitted to the mobile communication terminal of the user(S370). Setup registration information corresponding to the reception approval/rejection setup registration message is received from the mobile communication terminal of the user(S380). Received setup registration information is stored in the short message filtering database(S390).