Abstract: The general scheme of remote sensing of atmospheric precipitable water (PW) using ground-based GPS receiver is reviewed. The errors caused by different factors and the corresponding ways to avoid or reduce errors elaborated, and then the stepping of estimating water vapor from zenith wet delay is summarized. The GPS/STORM experiment and two methods to resolve PW are recommended. Finally, a set of solution to experiment and research is provided, and the problems on operational application in China are discussed