Total Terminal System and Operating Method Thereof

A total terminal system includes a front-seat total terminal provided in a front driver compartment of a taxi vehicle and a rear-seat total terminal provided in a rear passenger compartment of the taxi vehicle. The front-seat total terminal includes an application program device configured to execute a plurality of application programs and a data management device including a plurality of service data storage units configured to store data for providing a plurality of services, wherein a first application program among the plurality of application programs is configured to write first information to a corresponding first service data storage unit among the plurality of service data storage units and the first service data storage unit is configured to transmit the first information to a second application program that is connected to the first service data storage unit.