A mobile communication terminal for displaying supplementary information on a background screen includes a communication unit, a storage unit for storing cumulative transmissions and receptions of calls and messages corresponding to supplementary information, a cumulative number rank determiner for comparing the cumulative transmissions and receptions of calls and messages and determining a cumulative number rank for the phone number, a controller for creating a map consisting of the supplementary information arranged from the highest to the lowest cumulative number rank of the phone number, and a display unit for displaying the supplementary information together with the cumulative number rank. The terminal allows a user to easily visualize supplementary information corresponding to a phone number by display on the background screen.