Optical Mudule System is designed for the R&D of optical facilities and optical platforms. The system, which is scheduled to be launched into orbit in 2022 or so, is comprised of 2m-diameter main optical system, multiple rear-end functional modules, as well as the relevant on-orbit testing support and ground application system. It is expected to carry out astronomical observations in respect of large sky area, high-resolution, multicolor imaging and seamless spectrum-depth space touring, meanwhile also has function of conducting new experiments of earth remote sensing technology.