Disclosed are a traffic control method and terminal, the traffic control method comprising the steps of; transmitting, to a base station, a first message including information of an installed application; receiving a second message including information of a barring parameter for the application; determining whether to bar a data transmission on the basis of the barring parameter according to the generation of data from the application, during an operation in a radio resource control (RRC) connection mode; and selectively transmitting the data to the base station according to a determination result.