1. A mobile communication terminal comprising: a receipt unit which receives a short message based on a Short Message Service, wherein the short message is transmitted by a first sender; a short message interpretation unit which extracts a phone number of the first sender of the short message from a header of the short message; a mapping unit which maps the phone number and an image of the first sender; a short message processing unit which generates a first screen on which the image of the first sender is combined with the received short message if the image of the first sender mapped to the phone number exists; and an output unit which outputs the first screen to be displayed, wherein the first screen includes a word balloon in which the short message is displayed, and wherein the short message processing unit generates a second screen including an image of a second sender combined with a short message of the second sender and setts at least the first screen and the second screen in a group, wherein the output unit outputs at least the first screen and the second screen at the same time, and wherein the first screen includes a thumbnail image corresponding to the phone number of the first sender and an excerpt of the received short message.