An electronic device may include a housing, a display including a touch sensor panel, wherein the display is configured to move with respect to the housing so that at least one portion thereof is exposed from the inside of the housing to the front surface of the electronic device, and at least one processor operatively connected to the display. The at least one processor is configured to acquire, in a state in which at least one portion of the display is exposed to the front surface of the electronic device, data indicating a capacitance change on the at least one portion of the display through the touch sensor panel, identify a moisture-introduced state, based on the acquired data, and perform an operation of responding to the identified moisture-introduced state.