An electronic apparatus comprising: a communication interface; a memory; and a processor configured to: based on receiving a first audio signal comprising a user voice from a first sensor device from among a plurality of external sensor devices (200-1, 200-2, 200-3, 200-4, 200-5) through the communication interface, perform an operation corresponding to the user voice of the first audio signal; control the first sensor device to output a second audio signal indicating a result of performing the operation corresponding to the user voice of the first audio signal; based on receiving a third audio signal from a second sensor device from among the plurality of external sensor devices within a threshold time from a time of controlling the first sensor device through the communication interface, determine whether to process the third audio signal based on comparing the second audio signal and the third audio signal; and characterized in that the processor is further configured to obtain the threshold time based on an operation history of the first sensor device and the second sensor device stored in the memory and update the threshold time based on at least one of a signal intensity of the first audio signal or a signal intensity of the third audio signal. a communication interface; a memory; and a processor configured to: based on receiving a first audio signal comprising a user voice from a first sensor device from among a plurality of external sensor devices (200-1, 200-2, 200-3, 200-4, 200-5) through the communication interface, perform an operation corresponding to the user voice of the first audio signal; control the first sensor device to output a second audio signal indicating a result of performing the operation corresponding to the user voice of the first audio signal; based on receiving a third audio signal from a second sensor device from among the plurality of external sensor devices within a threshold time from a time of controlling the first sensor device through the communication interface, determine whether to process the third audio signal based on comparing the second audio signal and the third audio signal; and characterized in that the processor is further configured to obtain the threshold time based on an operation history of the first sensor device and the second sensor device stored in the memory and update the threshold time based on at least one of a signal intensity of the first audio signal or a signal intensity of the third audio signal. based on receiving a first audio signal comprising a user voice from a first sensor device from among a plurality of external sensor devices (200-1, 200-2, 200-3, 200-4, 200-5) through the communication interface, perform an operation corresponding to the user voice of the first audio signal; control the first sensor device to output a second audio signal indicating a result of performing the operation corresponding to the user voice of the first audio signal; based on receiving a third audio signal from a second sensor device from among the plurality of external sensor devices within a threshold time from a time of controlling the first sensor device through the communication interface, determine whether to process the third audio signal based on comparing the second audio signal and the third audio signal; and characterized in that the processor is further configured to obtain the threshold time based on an operation history of the first sensor device and the second sensor device stored in the memory and update the threshold time based on at least one of a signal intensity of the first audio signal or a signal intensity of the third audio signal.