A light-emitting diode includes a ceramic substrate, an electrode group setting on the substrate and co-fired with the ceramic substrate, an LED chip setting on the substrate and electrically connecting the electrode group. The electrode includes a first electrode and a second electrode spacing from the first electrode. The first electrode and the second electrode extend from a top surface of the substrate to a bottom surface of the substrate via side surfaces of the substrate. The light-emitting diode can be connected to a power source by the electrode group on the bottom surface of the substrate or by the electrode group on the side surfaces of the substrate.