Disclosed is a method of processing a schedule alarm message in a portable terminal comprising analyzing a message when the message is received in the portable terminal in order to check whether the message includes schedule information, extracting the schedule information from the message and storing the schedule information if the message includes the schedule information, and registering the schedule alarm message in a receive message list. The method of processing a schedule alarm message in a portable terminal further comprises displaying a display window including items used for displaying the stored schedule information and an alarm time when the user confirms the schedule alarm message, allowing the user to correct the schedule information and to set the alarm time by using the items displayed in the display window, and registering the corrected schedule alarm message to a schedule alarm message list in response to a schedule alarm message registration request.