The application provides a light-emitting device, comprising a substrate; a plurality of first light-emitting diode units on the substrate, wherein every first light-emitting diode unit has a first electrode structure; and a plurality of second light-emitting diode units among the plurality of first light-emitting diode units, wherein every second light-emitting diode unit has a second electrode structure. The second electrode structure of the second light-emitting diode unit is flipped over and electrically connected with the adjacent first electrode structure of the first light-emitting diode unit.