A sound output control system, comprising: at least one voice recognition device (20, 21, 22); a plurality of electronic devices (10, 30, 40, 50), each configured: to output sound, to detect voice recognition devices (20, 21, 22) that are around the respective electronic device (10, 30, 40, 50) within a predetermined distance, and to store the identification information of the detected voice recognition devices (20, 21, 22); and a server configured: to receive identification information from each of the voice recognition devices (20, 21, 22) and the plurality of electronic devices (10, 30, 40, 50), to receive information from one of the voice recognition devices (20, 21, 22) that has received a voice command from the user, and to transmit the identification information of the voice recognition device (20, 21, 22) that has received a voice command from the user to the plurality of electronic devices (10, 30, 40, 50); wherein, on receiving the identification information from the server, each of the plurality of electronic devices (10, 30, 40, 50) is configured: to determine whether the voice recognition device (20, 21, 22) that has received a voice command from the user and the electronic device (10, 30, 40, 50) are located in the same region based on the identification information received from the server and on the identification information stored on the respective electronic device (10, 30, 40, 50), and based on the voice recognition device (20, 21, 22) that has received a voice command from the user and the electronic device (10, 30, 40, 50) being located in the same region, to reduce the volume of the sound or stop outputting the sound being output from the respective electronic device (10, 30, 40, 50). at least one voice recognition device (20, 21, 22); a plurality of electronic devices (10, 30, 40, 50), each configured: to output sound, to detect voice recognition devices (20, 21, 22) that are around the respective electronic device (10, 30, 40, 50) within a predetermined distance, and to store the identification information of the detected voice recognition devices (20, 21, 22); and to output sound, to detect voice recognition devices (20, 21, 22) that are around the respective electronic device (10, 30, 40, 50) within a predetermined distance, and to store the identification information of the detected voice recognition devices (20, 21, 22); and a server configured: to receive identification information from each of the voice recognition devices (20, 21, 22) and the plurality of electronic devices (10, 30, 40, 50), to receive information from one of the voice recognition devices (20, 21, 22) that has received a voice command from the user, and to transmit the identification information of the voice recognition device (20, 21, 22) that has received a voice command from the user to the plurality of electronic devices (10, 30, 40, 50); to receive identification information from each of the voice recognition devices (20, 21, 22) and the plurality of electronic devices (10, 30, 40, 50), to receive information from one of the voice recognition devices (20, 21, 22) that has received a voice command from the user, and to transmit the identification information of the voice recognition device (20, 21, 22) that has received a voice command from the user to the plurality of electronic devices (10, 30, 40, 50); wherein, on receiving the identification information from the server, each of the plurality of electronic devices (10, 30, 40, 50) is configured: to determine whether the voice recognition device (20, 21, 22) that has received a voice command from the user and the electronic device (10, 30, 40, 50) are located in the same region based on the identification information received from the server and on the identification information stored on the respective electronic device (10, 30, 40, 50), and based on the voice recognition device (20, 21, 22) that has received a voice command from the user and the electronic device (10, 30, 40, 50) being located in the same region, to reduce the volume of the sound or stop outputting the sound being output from the respective electronic device (10, 30, 40, 50). to determine whether the voice recognition device (20, 21, 22) that has received a voice command from the user and the electronic device (10, 30, 40, 50) are located in the same region based on the identification information received from the server and on the identification information stored on the respective electronic device (10, 30, 40, 50), and based on the voice recognition device (20, 21, 22) that has received a voice command from the user and the electronic device (10, 30, 40, 50) being located in the same region, to reduce the volume of the sound or stop outputting the sound being output from the respective electronic device (10, 30, 40, 50).