An embodiment terminal system for a taxi vehicle includes a first terminal positioned for a passenger of the taxi vehicle, and a second terminal positioned for a driver of the taxi vehicle and configured to display a first communication user interface (UI) for receiving information to be transferred from the driver to the passenger on a first screen, and in response to any one of first options included in the first communication UI being selected, to transmit first message information that is determined based on the selected any one first option to the first terminal, wherein the first options included in the first communication UI are chosen based on driving status information of the taxi vehicle, a boarding type of the passenger, or surrounding environment information of the taxi vehicle.