As a new nanomaterial, quantum dot (QD) has lots of advantages, including narrow emission linewidth, broad absorption spectra, high photoluminescence quantum yield (PLQY) and solution-processed characteristic and so on. Recently, integrating quantum dots (QDs) with LED chips to adjust the emission spectra is one of the most promising technique in display applications, successfully achieving a wide-color gamut over 120% NTSC by color conversion processes (the full width at half maximum of red, green, and blue spectra smaller than 20 nm). However, the application of quantum dots in high-performance display devices is severely limited by their poor luminous stability, low luminous efficiency, and full-color technology problems. How to solve these issues and achieve stable and efficient new quantum dot full-color display still needs further exploration. This paper reviews the research progress of quantum dot modification, quantum dot packaging method, quantum dot coating fluorescence enhancement strategy and quantum dot patterned display application at home and abroad, analyzes the progress of quantum dot LED devices from the aspects of packaging coating, fluorescence enhancement strategy and patterned quantum dot manufacturing method, and provides valuable information for the potential of quantum dot LED based display technology in the future.