GLI (Global Jmager) is a 36 channel visible and infrared radiometer/imager onboard the NASDA/ADEOS-II satellite. The information carried by GLI for the earth-atmosphere system is huge and difficult to be extracted enough efficiently with an operational satellite data analyzing system. We discuss and overview the algorithm development of the GLI Level-2 products at NASDAIEORC. We have several innovations to make the system unique and efficient. GLI simulator and GLI synthetic data sets are among those, which will be useful even for the science and engineering communities of other earth observation satellite systems. We will also overview the current status of the entire GLI project.