A method of iris scanning and proximity sensing includes: receiving selection information of an operation mode； sensing an iris including emitting light having an amount of light of a first level, and photographing an iris using the emitted light if a selected operation mode is a iris scanning mode； sensing a proximity including emitting light having an amount of light of a second level, and sensing information on whether an object has approached using the emitted light if the selected operation mode is a proximity sensing mode； and recognizing the iris using the photographed iris image, and performing a function according to the sensed information on whether the object has approached, and the first level has a value higher than the value of the second level.
