The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a first network data analytics function (NWDAF) of a first public land mobile network (PLMN) in a communication system is provided. The method includes registering information on the first NWDAF to a first network repository function (NRF) of the first PLMN, transmitting, to the first NRF, a first message for requesting NWDAF information to collect, from an operator related to a second PLMN, analytics data for a roaming terminal, receiving, from the first NRF, a second message for providing information on a second NWDAF of the second PLMN, transmitting, to the second NWDAF, a third message for requesting the analytics data, based on the information on the second NWDAF, and receiving, from the second NWDAF, a fourth message notifying that provision of the analytics data is accepted.