With the gradual saturation of the spectrum resources of radio frequency communication, there is an urgent need to open up a new race track for local highspeed communication, while visible light communication benefits from the nature of large bandwidth and spectrum licensefree since limited communication range, which is one of the ideal supplements of traditional communication. The rapid development of GaNbased bluegreen light source in the past decade, especially the development of microLED as the small size and high speed light source with excellent performance, has made it an important driving force for terminal communication in the "Internet of Everything" era of Internet of Things. In this paper, the development history and recent progress of bluegreen highspeed light sources are reviewed from two main categories: bluegreen microLED and GaNbased bluegreen light sources with resonators (including superluminescent diodes and lasers). It mainly includes three aspects: microLED structure and array, surface emitting cavity enhanced light source and edge emitting cavity enhanced light source.