In waterway dredging,port design and environmental protection dredging projects,high-precision bathymetric measurement results are often needed.The quality of bathymetric measurement directly affects the final measurement results,so the quality control of bathymetric measurement is particularly important.There’re two modes of bathymetric measurement,i.e.the traditional bathymetric measurement mode and RTK three-dimensional depth measurement mode,and the latter is a new technology popularized in the measurement specification of water transportation engineering.For RTK three-dimensional depth measurement,combining with the practical hydrographic engineering,we control the standardization,rationality and integrity of data from the software and hardware settings,field measurement process,data processing,and results quality inspection,to guarantee that the final result can meet the requirements.