An electronic device and a schedule user Interface (UI) providing method thereof are provided. The method may include arranging and displaying a plurality of items corresponding to a plurality of schedules in a line according to time information and priority information included in the plurality of items in a schedule UI, receiving a user command for inputting a new first schedule in the schedule UI, and in response to a second schedule of which time overlaps with time of the input first schedule being present among the plurality of schedules, displaying an indicator in one of a first item corresponding to the first schedule and a second item corresponding to the second schedule according to a priority of the first schedule and the second schedule.