EL device and its making method

The invention discloses an electroluminescence device, which comprises a base plate, a reflecting layer, a nano-pattern transparent conductive layer, at least a luminescent diode element, a first contact electrode and a second contact electrode. Among which, the reflecting layer is arranged on the base plate; the nano-pattern transparent conductive layer is arranged on the reflecting layer; the luminescent diode element is arranged on the nano-pattern transparent conductive layer; the luminescent diode comprises a first semiconductor layer, a luminescent layer and a second semiconductor layerone by one; the second semiconductor layer is arranged on the nano-pattern transparent conductive layer and the reflecting layer; the first contact electrode is electrically connected with the first semiconductor layer; the second contact electrode is electrically connected with the second semiconductor layer.