Smart device and method for controlling dynamic display using cover unit

When controlling a dynamic display through a smart device of which at least one side is detachably combined to a cover member, a sensing value generated from at least one sensing unit among multiple sensing units installed on a display unit of the smart device is detected, an output area exposed by the cover member among multiple output areas pre-distinguished on the display unit based on the sensing value is determined, and the exposed output area is activated while a non-exposed output area by the cover member is deactivated.