After analyzing the whole agricultural system of energy and matter, the author finds that reasonable running of animal production system is the key to the improvement of rangeland, the safeguard of ecological environment and the growth of agro-economy. With the system theory and the method of grey connection, the author also does the research on the relationship between animal husbandry and others, and on the inner construction and funtion of the production system. Finally, the strategy for handling the existing problems of system is put out.