An electronic device comprising: a flexible display ; an input interface comprising a touch panel configured to detect a touch input; a sensor ; and a processor functionally coupled with the display, the input interface, and the sensor, wherein the processor is configured to: determine , by using the sensor, whether a state of the electronic device corresponds to a state indicating that the electronic device is worn by a user; if the state corresponds to the state indicating that the electronic device is worn by a user, determine detection of a multi-touch and analyze a press level of the multi-touch; if the multi-touch has a press level over a preset press level, determine detection of an additional interaction, wherein the additional interaction comprises a motion of the electronic device; determine a pressing time of the multi-touch, wherein the pressing time corresponds to a time during which the multi-touch has the press level over the preset press level; and in case no additional interaction is detected, perform a preset function, if the multi-touch is detected and the pressing time is maintained over a preset time; or in case the additional interaction is detected, perform the preset function, if the multi-touch is detected and the multi-touch has a press level over the preset press level. a flexible display ; an input interface comprising a touch panel configured to detect a touch input; a sensor ; and a processor functionally coupled with the display, the input interface, and the sensor, wherein the processor is configured to: determine , by using the sensor, whether a state of the electronic device corresponds to a state indicating that the electronic device is worn by a user; if the state corresponds to the state indicating that the electronic device is worn by a user, determine detection of a multi-touch and analyze a press level of the multi-touch; if the multi-touch has a press level over a preset press level, determine detection of an additional interaction, wherein the additional interaction comprises a motion of the electronic device; determine a pressing time of the multi-touch, wherein the pressing time corresponds to a time during which the multi-touch has the press level over the preset press level; and in case no additional interaction is detected, perform a preset function, if the multi-touch is detected and the pressing time is maintained over a preset time; or determine , by using the sensor, whether a state of the electronic device corresponds to a state indicating that the electronic device is worn by a user; if the state corresponds to the state indicating that the electronic device is worn by a user, determine detection of a multi-touch and analyze a press level of the multi-touch; if the multi-touch has a press level over a preset press level, determine detection of an additional interaction, wherein the additional interaction comprises a motion of the electronic device; determine a pressing time of the multi-touch, wherein the pressing time corresponds to a time during which the multi-touch has the press level over the preset press level; and in case no additional interaction is detected, perform a preset function, if the multi-touch is detected and the pressing time is maintained over a preset time; or in case the additional interaction is detected, perform the preset function, if the multi-touch is detected and the multi-touch has a press level over the preset press level. <EOS>