Abstract: Water-saving irrigation is important to develop agriculture and increase yields in the arid, semi-arid and semi-humid areas. An economical and effective irrigation management technique can save water and increase yields as well. This technique, based on a summation of researches both in China and abroad, takes moisture content, soil, plant and atmosphere as an integral part of the whole, sets up an water-balance equation by means of the law of conservation of matters energy. The equation is: W_soil=F_rainfall+Q_irrigation+W_origination-W_runoff-W_wither-W_penetrate-nET cSuch physical parameters as soil unit weight, field capacity, withering parameter, original soil’s water content and etc. were surveyed. The meteorological data as temperature and rainfall from meteorological observation and forecast were obtained. The advanced method is applied to calculate crop’s transpiration. According to the relation between soil’s water content and crop’s transpiration, the irrigation time and amount are obtained. Thereby a proper irrigation system is determined. The application shows that this technique has the very good function to increased corn yield and save water.