Abstract: The establishment of measurement control system for Water Diversion Project in Central Yunnan Province faced several technical difficulties, such as long span of survey area, high average altitude, large variation of elevation difference and difficult connection of sections. In view of the long span of the project, a narrow band projection method was presented to control the Gauss deformation. Then aiming at the characteristics of high average elevation and great difference of elevation for the project, a new elevation variation adaptive projection compensation was studied, which can control the deformation of elevation naturalized accurately. In the aspect of section connection, the ellipsoid transformation method was researched systematically, the ellipsoid expansion connection mode of generalized differential was determined, and the vertical projection method was applied to control the change of coordinate value and connect the measurement results of the two sections. In general, a complete set of high precision design scheme for measurement control system is provided for Water Diversion Project in Central Yunnan Province, and a unique sample and experience are also offered for the measurement technology of the super large cross basin water diversion projects.