The present application relates to a light-emitting device and a fabrication method thereof, a display device or lighting device, the light-emitting device comprising: a substrate; a light-emitting structure layer disposed on one side of the substrate and comprising a light-emitting function layer; a first light extraction layer disposed on a light exit side of the light-emitting function layer, a light exit surface of the first light extraction layer having an irregular brush-like micro-nano structure.