The optoelectronic microsystem with the advantages of high detection accuracy, fast processing speed and large transmission flux, has been widely used in information transmission, target detection and photon processing. Based on the current situation of optoelectronic microsystem products and technologies at home and abroad, this paper focuses on information transmission, target detection and photon processing, discusses optoelectronic devices such as lasers, modulators and waveguides, and briefly introduces three-dimensional integration technology and optoelectronic microsystem platform. The development plans of photoelectric microsystem at home and abroad are briefly described, and the urgency and necessity of developing independent microsystem platform and related technologies in China are put forward.