An electronic device mounted in a vehicle, and an method performed thereby are provided. The electronic device may include a touch screen, memory storing at least one instruction, and at least one processor communicatively coupled to the touch screen and the memory. The at least one instruction, when executed by the at least one processor individually or collectively, may cause the electronic device to recognize an input event, based on receiving a multi-touch input or a hover input, of a user with respect to the touch screen, may identify a function corresponding to the input event, based on shape information of a plurality of points and position information of the plurality of points at which the input event is recognized, may change a function value with respect to the identified function, based on a gesture input being recognized via the touch screen, and may display a user interface (UI) indicating the changed function value.