According to one aspect of the present disclosure, there is provided a method for providing a user interface. The method includes when an input event occurs, acquiring information on postures or motions of a first device and a second device associated with the input event in a preset time interval including the time of occurrence of the input event, and determining a command to be carried out in response to the input event with reference to a relative relationship between the posture or motion of the first device and that of the second device.