The present disclosure relates to a 5G or pre-5G communication system to be provided in order to support higher data transmission rates than 4G communication systems such as LTE. According to an embodiment of the present disclosure, disclosed is a method for a time-sensitive networking (TSN) application function device of a mobile communication system to report a delay time of the mobile communication system to a TSN server, wherein a residence time based on a grand master (GM) clock of the mobile communication system is received from a UE communicating with a first TNS node, and a packet delay budget (PDB) based on a clock of the mobile communication system is received from a user plane function (UPF) device that communicates with a second TSN node. The PDB is the time it takes to transmit packets or messages between the UE and a UPF, and bridge delay information based on a TSN clock is delivered to the TSN server on the basis of such information.