The Eu3+-containing polymer ternary complex was synthesized. And it was used as the emitting layer of the organic electroluminesence (OEL) device successfully. The red light of Eu3+ from the electrominesence (EL) device was seen at 16 V. A considerable difference between the EL and photoluminesence (PL) spectra was observed. It was noticed that two spectra were very different. In PL spectrum the main peak was at 618 nm. But for the OEL spectrum, there are two peaks at 595 nm and 657 nm. The probable mechanism was discussed.