A method for synchronizing data between a mobile terminal and a computer is provided, in which schedule data can be synchronized between the mobile terminal and the computer using a radio network and Internet network. In this method, either a mobile terminal or a computer corresponding to a party requesting data to synchronize transmits its head data to another party for synchronizing data through an Over-The-Air Function (OTAF) system. The party synchronizing data compares the transmitted head data with its head data, and transmits its newest data and corresponding head data in accordance with the comparison result. The requesting party stores the newest data, and transmits its newest data to the parry for synchronizing data through the OTAF system. Then, the party for synchronizing data stores the newest data of the party for requesting data to synchronize in its memory area.