The main works of diverting south-water to north which the paper mentioned, from three gorges reservoir of Yangtze River, Cross Yangtze River, Huai River, Yellow River and their drainage area, is 1600 km long. That's great project which make great change to take place in our country.The programme of the project begin in 1950's, and its feasibility has been scientifically expounded and proved. In 1984, infrared colour aerial photography on the scale l/20000 had been finished along the main works from Yellow River to Beijing section by center of Remote Sense, Ministry of Geology and Mineral Resources in order to discuss the feasibility of the project and prepare to earlier work. In this time, we choise a section which is 407km long and 18916km² in Hebei to have success-fully done the analysis of remote sensing on hydrological engineering geology.