A method of a terminal for controlling quality of service (QoS) information is provided. The method includes acquiring a data packet, identifying a traffic type of the data packet, when QoS control is required for a service flow according to the traffic type, transmitting, to a network device, an uplink (UL) data packet, first QoS support information of the terminal, and a QoS support or non-support display request of the network device, receiving a downlink (DL) data packet from a service providing server, determining whether the DL data packet corresponds to the UL data packet and includes second QoS support information of at least one network device connecting the terminal and the service providing server, and identifying the second QoS support information based on a result of the determining.