1. An apparatus for compressing a Short Message Service (SMS) message, the apparatus comprising: an input unit through which characters are input by a user; a display unit which displays the characters input by the user; a control unit which compares the characters input by the user with a stored sentence table of recommended sentences to determine whether there is at least one recommended sentence among the recommended sentences of the sentence table that corresponds to the input characters, and if it is determined that there is the at least one recommended sentence that corresponds to the input characters, controls the display unit to display the at least one recommended sentences; a converting unit which converts a recommended sentence selected by the user from among the at least one recommended sentence displayed by the displayed unit into a compression code; and a transmission unit which transmits an SMS message that includes the recommended sentence converted into the compression code.