Provided are an electronic device and an operation method thereof. The electronic device includes: a first sound receiver configured to receive a sound input while power is supplied to the first sound receiver in a standby state; a trigger word/phrase recognizer configured to recognize whether the sound input received by the first sound receiver corresponds to a trigger word or phrase; a second sound receiver configured to receive a sound input by receiving supply of power based on the trigger word or phrase being recognized by the trigger word/phrase recognizer; and a data transceiver configured to output a first sound input signal supplied from the first sound receiver and a second sound input signal supplied from the second sound receiver.