A portable integrated device and a method of controlling power thereof. The method of controlling power to a digital integrated device which includes a first body and a second body slidingly attached to each other and a first mode and a second mode including sliding the first body relative to the second body from an open position to a closed position, turning off power of the digital integrated device in the first mode, and maintaining the power of the digital integrated device in the second mode. Accordingly, power control may be performed differently according to whether the sliding part is open or closed and whether the preset function mode of the portable integrated device is a camera mode or a non-camera mode, so that functions of the non-camera modes can be maintained even when the sliding part is closed.