In recent years, colloidal quantum dots (CQDs) have been widely applied to photonic devices due to their highly efficient illumination, narrow linewidth emission, and widely tunable emission wavelength. Both photon generation and absorption can be accomplished by CQDs and their special characteristics has enhanced the performances of these traditional devices. In this talk, we will provide our latest progress on such devices and the past experience we had in our lab. The highly reliable CQD package will play a crucial rule for the next generation photonic devices.