An electronic device according to various embodiments comprises a memory and at least one communication processor, the at least one communication processor capable of controlling to: confirm a plurality of predetermined measurement objects (MOs) for measuring the downlink performance of a second communication network, while connected to a first base station of a first communication network; confirm measurement priorities of the plurality of predetermined MOs on the basis of at least information relating to the transmission/reception performance of signals having a frequency corresponding to the respective plurality of MOs and stored in the memory; measure the reception signal strength with respect to at least one MO from a signal transmitted from a second base station of the second communication network, on the basis of the measurement priorities of the plurality of MOs; and transmit at least one measurement report (MR) to the first base station of the first communication network, on the basis of the measurement result of the reception signal strength with respect to the at least one MO. Various other embodiments are possible.