Disclosed is an electronic device including a microphone, a communication circuit, a memory, and a processor operatively connected to the microphone, the communication circuit, and the memory. The memory may store one or more instructions that, when executed, cause the processor to: receive an utterance through the microphone, execute a function to detect a signal received from at least one external electronic device based on the utterance, identify the at least one external electronic device based on the signal, determine an external electronic device to be registered from among the at least one external electronic device based on device information included in the signal and device information extracted from the utterance, authenticate the external electronic device to be registered, using voiceprint analysis on the utterance, and register the authenticated external electronic device in an external server.