Abstract: Using the theory of grey system, an analytical model of dynamic tendency has been established in this,paper, based on the 30-year historical data of the development of animal husbandry of Qinghai Province.Qualitative and quantitative system analysis have been made and some constructive suggestions for the development strategies of animal husbandry for that province prpposed. The models showed: i. The maximun carrying capacity was 38 793 444 sheep units according to the present primary productivity of the grassland. 2. The number of cattle, camel and pig had an increasing tendency in different degrees, while that of sheep,, horse, mule, and donky decreased.