A first electronic device comprising: a communication circuit; a speaker; a microphone configured to receive a sound; a memory; and a processor electrically connected with the communication circuit, the speaker, the microphone, and the memory, and configured when a second electronic device is connected to the first electronic device through the communication circuit to: determine whether there is auditory data stored in the memory of the first electronic device; when there is no auditory data stored in the memory of the first electronic device: control the communication circuit to send a request for auditory data to the second electronic device; and control the communication circuit to receive the auditory data from the second electronic device; or when there is auditory data stored in the memory of the first electronic device: check whether the auditory data is in the second electronic device; and control the communication circuit to transmit the auditory data to the second electronic device when there is no auditory data in the second electronic device; correct sound data received through the microphone using the auditory data; control the communication circuit to receive corrected audio data from the second electronic device; synthesize the corrected sound data and the corrected audio data received from the second electronic device to obtain first synthesized data; and control the speaker to output a first new sound corresponding to the first synthesized data through the speaker. a communication circuit; a speaker; a microphone configured to receive a sound; a memory; and a processor electrically connected with the communication circuit, the speaker, the microphone, and the memory, and configured when a second electronic device is connected to the first electronic device through the communication circuit to: determine whether there is auditory data stored in the memory of the first electronic device; when there is no auditory data stored in the memory of the first electronic device: control the communication circuit to send a request for auditory data to the second electronic device; and control the communication circuit to receive the auditory data from the second electronic device; or when there is auditory data stored in the memory of the first electronic device: check whether the auditory data is in the second electronic device; and control the communication circuit to transmit the auditory data to the second electronic device when there is no auditory data in the second electronic device; correct sound data received through the microphone using the auditory data; control the communication circuit to receive corrected audio data from the second electronic device; synthesize the corrected sound data and the corrected audio data received from the second electronic device to obtain first synthesized data; and control the speaker to output a first new sound corresponding to the first synthesized data through the speaker. determine whether there is auditory data stored in the memory of the first electronic device; when there is no auditory data stored in the memory of the first electronic device: control the communication circuit to send a request for auditory data to the second electronic device; and control the communication circuit to receive the auditory data from the second electronic device; or control the communication circuit to send a request for auditory data to the second electronic device; and control the communication circuit to receive the auditory data from the second electronic device; or when there is auditory data stored in the memory of the first electronic device: check whether the auditory data is in the second electronic device; and control the communication circuit to transmit the auditory data to the second electronic device when there is no auditory data in the second electronic device; check whether the auditory data is in the second electronic device; and control the communication circuit to transmit the auditory data to the second electronic device when there is no auditory data in the second electronic device; correct sound data received through the microphone using the auditory data; control the communication circuit to receive corrected audio data from the second electronic device; synthesize the corrected sound data and the corrected audio data received from the second electronic device to obtain first synthesized data; and control the speaker to output a first new sound corresponding to the first synthesized data through the speaker.