Quantum dots was a kind of new fluorescent material with wide absorption, narrow full width of half maximum and high quantity yield, fluorescence quantum efficiency. Studying on the application of quantum dots material would be helpful to realize high color gamut and ultrathin display screen. Multiple applications of the photoluminescence quantum dot and electroluminescence quantum dot in display were introduced, and the technical principles of display technology using QD-backlight, QD-CF, QLED were elaborated as well. The characteristics and development of different technologies were also analyzed. With the development of high color gamut in display, quantum dot materials will not only be widely used in LCD, but also be a powerful substitute for organic light-emitting materials. In the future, active light-emitting AMQLED display will develop synchronously with AMOLED and become the mainstream of the market.