An electronic device includes: an antenna; a communication circuit connected with the antenna; and one or more processors, wherein the one or more processors are configured to: identify a second amount of power corresponding to a second output signal outputted through the antenna for a second time using the communication circuit, the operation of identifying the second amount of power comprising an operation of identifying a second electromagnetic wave absorption rate corresponding to the second amount of power; determine a maximum output power for a third output signal to be outputted through the antenna according to a difference between a target electromagnetic wave absorption rate and the second electromagnetic absorption rate; and output the third output signal through the antenna based at least one the maximum output power.