Abstract: In the study some modern technologies of information collection, such as RFID, PDA and wireless network were used to collect some important information about the body status of individual dairy cattle on the constructed precision breeding network system for dairy cattle. After that, combining all kinds of data collected with those pre-setting models that forecast nutrient requirements and milk production of dairy cattle, the system is able to calculate nutrient requirements per day on single diary cattle. Those dairy cattle with the same production or physiological phase, filtrated by computer program, were selected to be fed with the same concentrate supplement and forage feeds, adopting different ration formulas optimised by linear programme module in terms of their ration standards calculated before. The results show that the differences among six ration formulas existed by a few of materials as alfalfa hay and the concentrate supplement in different usages, and precision feeding based on single dairy cattle status was realized. Furthermore, it points out that key factors to impact precision feeding are whether collecting information is real time and exact, whether the adopted forecast models are scientific and whether the used feed ingredient data reflect their real nutritional values, etc.