An electronic device (101; 202), comprising: at least one communication circuit; a microphone; at least one speaker; at least one processor operatively connected with the at least one communication circuit, the microphone, and the at least one speaker; and at least one memory operatively connected with the at least one processor, wherein the at least one memory stores instructions, which when executed, instruct the at least one processor to: while the electronic device (101; 202) is wiredly or wirelessly connected with an access point, AP connected with a plurality of external electronic devices, based on receiving, through the microphone, a part of a wake-up utterance to invoke a voice-based intelligent assistant service during a first time, broadcast first identification information about the electronic device and receive second identification information broadcast from at least one external electronic device among the plurality of external electronic devices, after receiving a whole of the wake-up utterance through the microphone during a second time after the first time, individually transmit first information related to the wake-up utterance received through the microphone to the at least one external electronic device based on the second identification information and individually receive, from the at least one external electronic device, second information related to the wake-up utterance received by the at least one external electronic device based on the broadcast first identification information, and determine whether the electronic device (101; 202) is a leader device to transmit voice information received after the wake-up utterance to an external server (108; 212) based on at least part of the first information and the second information; wherein the first information and the second information include at least one of a signal-to-noise ratio, SNR, audio quality, volume, sound pressure, or a confidence score of the wake-up utterance. at least one communication circuit; a microphone; at least one speaker; at least one processor operatively connected with the at least one communication circuit, the microphone, and the at least one speaker; and at least one memory operatively connected with the at least one processor, wherein the at least one memory stores instructions, which when executed, instruct the at least one processor to: while the electronic device (101; 202) is wiredly or wirelessly connected with an access point, AP connected with a plurality of external electronic devices, based on receiving, through the microphone, a part of a wake-up utterance to invoke a voice-based intelligent assistant service during a first time, broadcast first identification information about the electronic device and receive second identification information broadcast from at least one external electronic device among the plurality of external electronic devices, after receiving a whole of the wake-up utterance through the microphone during a second time after the first time, individually transmit first information related to the wake-up utterance received through the microphone to the at least one external electronic device based on the second identification information and individually receive, from the at least one external electronic device, second information related to the wake-up utterance received by the at least one external electronic device based on the broadcast first identification information, and determine whether the electronic device (101; 202) is a leader device to transmit voice information received after the wake-up utterance to an external server (108; 212) based on at least part of the first information and the second information; wherein the first information and the second information include at least one of a signal-to-noise ratio, SNR, audio quality, volume, sound pressure, or a confidence score of the wake-up utterance. while the electronic device (101; 202) is wiredly or wirelessly connected with an access point, AP connected with a plurality of external electronic devices, based on receiving, through the microphone, a part of a wake-up utterance to invoke a voice-based intelligent assistant service during a first time, broadcast first identification information about the electronic device and receive second identification information broadcast from at least one external electronic device among the plurality of external electronic devices, after receiving a whole of the wake-up utterance through the microphone during a second time after the first time, individually transmit first information related to the wake-up utterance received through the microphone to the at least one external electronic device based on the second identification information and individually receive, from the at least one external electronic device, second information related to the wake-up utterance received by the at least one external electronic device based on the broadcast first identification information, and determine whether the electronic device (101; 202) is a leader device to transmit voice information received after the wake-up utterance to an external server (108; 212) based on at least part of the first information and the second information; wherein the first information and the second information include at least one of a signal-to-noise ratio, SNR, audio quality, volume, sound pressure, or a confidence score of the wake-up utterance.