The technology system for frequency conversion and steady flow pumping of submersible pump is suitable for different conditions, it can not only ensure the digital and analog observations of the hydro-geochemical parameters, but also implement the digital water level and temperature measurement from the same well, besides tidal effect and coseismal effect can be recorded, which was no lower than the quality level of observational data obtained under the condition of natural automatic flow, so it is a new technique worthy of promotion.