Organic electroluminescent technology (OEL) is the new star of the flat panel displays due to its great promise for making a thin, bright, light, fast and energy-efficient self-emitting display. En the last decade, OEL had been improved dramatically in material development and device fabrication. All colors are available now for both molecular and polymeric luminescent materials and their efficiency are extremely high. In combination with the advancement of full-color patterned methods and low temperature poly-Si technology, full color OEL display will soon be realized commercially in both small size and large size application. In this article, a basic contour of OEL and some recent development of its related technology will be introduced.