A method for measuring an electromagnetic (EM) signal radiated from an external electronic device and an electronic device thereof are provided. The electronic device includes a housing, a display, a first conducting unit, a second conducting unit, at least one EM sensing circuit, at least one wireless communication circuit, a processor, and a memory. The memory stores instructions of when being executed, enabling the processor to receive, by using the first conducting unit, a first signal sensed by the EM sensing circuit, and receive, by using the second conducting unit, a second signal sensed by the EM sensing circuit, and provide a signal pattern on the basis of the first signal and the second signal, and identify an external electronic device, at least partially on the basis of the signal pattern.