The invention discloses a light-emitting diode which comprises a substrate, a first conducting-type semiconductor layer, plural pillars, a transparent insulating material, an illuminating layer, a second conducting-type semiconductor layer, a first transparent conducting layer and a second transparent conducting layer. The first conducting-type semiconductor layer is formed on the substrate, and the top surface of the first conducting-type semiconductor layer comprises a first region and a second region surrounded by the first region. The pillars are formed on the first region. The transparent insulating material is filled in the gaps between the pillars to be as high as the pillars. The illuminating layer is formed on the second region, and the second conducting-type semiconductor layer is formed on the illuminating layer. The first transparent conducting layer is formed on the second conducting-type semiconductor layer, and the second transparent conducting layer is formed on a top surface of the pillars and the transparent insulating material.