A method for transmitting and receiving information related to charging policy by a terminal in a mobile communication system, the method comprising: acquiring, from a server associated with a service, first information associated with a charging policy of the service in response to executing an application related to the service; transmitting, to a core network, a data packet related to the service, the first information associated with the charging policy of the service being included in a header of the data packet (330; 530, 535; 720, 725; 810, 815, 840, 845; 1260, 1265, 1275; 1315, 1320; 1415, 1420); receiving, from the core network, a response related to the service corresponding to the data packet (337; 545, 550; 735, 740; 850, 855; 1285, 1290, 1295; 1335, 1340; 1430, 1435); transmitting or receiving data related to the service generated by the application, based on the response ; transmitting, to the core network, a request message to stop the service based on termination of the application associated with the service; removing at least some data related to the service in response to receiving a response message corresponding to the request message from the core network; and displaying termination of the service, wherein the header of the data packet includes second information that represents that the transmitted data packet is a sponsored service-related message, wherein the first information associated with the charging policy of the service is transmitted to a node related to a charging policy of the core network when the second information is included in the header of the data packet, and wherein the data related to the service is charged based on the first information associated with the charging policy of the service. acquiring, from a server associated with a service, first information associated with a charging policy of the service in response to executing an application related to the service; transmitting, to a core network, a data packet related to the service, the first information associated with the charging policy of the service being included in a header of the data packet (330; 530, 535; 720, 725; 810, 815, 840, 845; 1260, 1265, 1275; 1315, 1320; 1415, 1420); receiving, from the core network, a response related to the service corresponding to the data packet (337; 545, 550; 735, 740; 850, 855; 1285, 1290, 1295; 1335, 1340; 1430, 1435); transmitting or receiving data related to the service generated by the application, based on the response ; transmitting, to the core network, a request message to stop the service based on termination of the application associated with the service; removing at least some data related to the service in response to receiving a response message corresponding to the request message from the core network; and displaying termination of the service, wherein the header of the data packet includes second information that represents that the transmitted data packet is a sponsored service-related message, wherein the first information associated with the charging policy of the service is transmitted to a node related to a charging policy of the core network when the second information is included in the header of the data packet, and wherein the data related to the service is charged based on the first information associated with the charging policy of the service. <EOS>