An electronic apparatus, comprising: a first communication module comprising a plurality of antennas and configured to communicate in a first communication method using the plurality of antennas; and a second communication module comprising at least one antenna and configured to communicate in a second communication method using the antenna; wherein the first communication module is further configured to change a transmission output level of the first communication module from a first transmission output level to a second transmission output level in response to the second communication module receiving data, and change the transmission output level from the second transmission output level to the first transmission output level in response to the second communication module completing the reception of the data, and wherein the first communication module is further configured to change a transmission output level of each of the plurality of antennas based on an absolute maximum reception level of the second communication module and a distance between each of the plurality of antennas and the antenna, in response to a signal indicating that the second communication module receives data, being received from the second communication module. a first communication module comprising a plurality of antennas and configured to communicate in a first communication method using the plurality of antennas; and a second communication module comprising at least one antenna and configured to communicate in a second communication method using the antenna; wherein the first communication module is further configured to change a transmission output level of the first communication module from a first transmission output level to a second transmission output level in response to the second communication module receiving data, and change the transmission output level from the second transmission output level to the first transmission output level in response to the second communication module completing the reception of the data, and wherein the first communication module is further configured to change a transmission output level of each of the plurality of antennas based on an absolute maximum reception level of the second communication module and a distance between each of the plurality of antennas and the antenna, in response to a signal indicating that the second communication module receives data, being received from the second communication module. wherein the first communication module is further configured to change a transmission output level of the first communication module from a first transmission output level to a second transmission output level in response to the second communication module receiving data, and change the transmission output level from the second transmission output level to the first transmission output level in response to the second communication module completing the reception of the data, and wherein the first communication module is further configured to change a transmission output level of each of the plurality of antennas based on an absolute maximum reception level of the second communication module and a distance between each of the plurality of antennas and the antenna, in response to a signal indicating that the second communication module receives data, being received from the second communication module.