1. A method for synchronizing data between a mobile terminal and a computer comprising the steps of: transmitting, at either the mobile terminal or the computer corresponding to a party for requesting data to synchronize, its head data to other party for synchronizing data through an Over-The-Air Function (OTAF) system; comparing, at the party for synchronizing data, the transmitted head data of the party requesting data to synchronize with its head data; transmitting, at the party for synchronizing data, its newest data and a portion corresponding to newest data of the head data of the party for requesting data, in accordance with the comparison result, to the party for requesting data to synchronize through the OTAF; storing the newest data of the party for synchronizing data in the party for requesting data to synchronize to transmit the newest data of the party for requesting data to synchronize to the party for synchronizing data through the OTAF; and storing the transmitted newest data of the party for requesting data to synchronize in a memory area of the party for synchronizing data.