An electronic device includes an antenna which transmits and receives a radio frequency (RF) signal, an RF circuit which processes the RF signal, and a control circuit which controls the RF circuit. The control circuit receives, from the RF circuit, a feedback signal, which the RF signal to be provided back as feedback from the antenna to the RF circuit, determines an impedance of the antenna based on the feedback signal, determines whether a water immersion of the electronic device occurs based on the determined impedance, and performs a set operation once it is determined that the water immersion of the electronic device occurs.