A method performed by a central unit-user plane (CU-UP) in a wireless communication system is provided. The method includes receiving information related to packet transmission from a user plane function (UPF), the information related to the packet transmission including a quality of service (QoS) flow provided, a slice provided with the QoS flow, an indicator indicating a terminal for receiving the QoS flow and a time parameter related to latency quality measurement, identifying a quality measurement value based on the received information related to the packet transmission, updating the received information related to the packet transmission based on the identified quality measurement value, and transmitting the updated information related to the packet transmission to a distributed unit (DU).