An electronic device may determine whether a user wears the electronic device by means of at least one sensor; measure a first bio-signal of the user by means of the at least one sensor while the user wears the electronic device; drive an RF sensor included in a charging device while the electronic device is connected to the charging device including the RF sensor through an interface, thereby measuring a second bio-signal of the user that is generated by the RF signal oscillated from the RF sensor; receive at least one of electric power for charging the battery from the charging device and the second bio-signal through the interface; generate health information of the user on the basis of at least the first bio-signal and the second bio-signal; and display the generated health information on a display.