According to an embodiment, a method of controlling an electronic device including a touch screen panel (TSP) at least a part of which is located in a housing may be withdrawn to the outside of the housing comprises: identifying a withdrawal extent of the TSP; selecting a reference line for controlling a power supplying range of a plurality of touch areas among a plurality of lines for dividing a plurality of touch areas of the TSP based on the withdrawal degree; supplying power to touch areas in a first direction in which the TSP is withdrawn based on the reference line and blocking power to touch areas in a second direction opposite to the first direction based on the reference line, among the plurality of touch areas; and restricting touch recognition with respect to a part extending from the reference line in one touch area adjacent to the reference line among the touch areas in the first direction.