A facial skin care device and a method of operating the same are disclosed. The facial skin care device comprises an oral insertion module configured to have a structure inserted in an oral cavity and include one or more oral electrodes contacted with a skin in the oral cavity, and a main body configured to include a main electrode connected electrically to at least one of the oral electrode on an outer surface of a facial skin and a current generation unit which is connected to the main electrode and generates current for applying electrical stimulation to the facial skin.