Abstract: In order to improve the Ji'nan area accuracy of tropospheric path wet delay measurement, improve the correction error of atmospheric refraction, and further improve Ji'nan area navigation and positioning, the Ji'nan area accuracy and performance of radio measurement and control system, based on the comparison datum of zenith wet delay and path wet delay calculated by Global Telecommunications System (GTS) sounding data of Ji'nan Station, the tropospheric zenith wet delay and path wet delay obtained by Marcor technology, Hopfield model and Ifadis model are compared and analyzed. The results show that the accuracy of zenith wet delay and path wet delay obtained by Marcor technology is higher, and the lower the elevation angle, the higher the relative accuracy of path wet delay. This indicates that Marcor technology has strong applicability in Ji'nan area, and is one of the effective means to obtain high-precision tropospheric wet delay. It is expected to gradually replace meteorological sounding technology in engineering applications.