Abstract: The analysis of the process of rural cooperative organization structure and the function evolution in Inner Mongolia from 2012 to 2014 indicated that with the change of the diversification of agricultural and animal husbandry industry structure, the main body of the rural cooperative organization in Inner Mongolia was the diversified structure which was dominated by ordinary farmers and large specialized households.The structure of rural cooperative organization in Inner Mongolia was significantly affected by the change of agricultural and animal husbandry production structure and its function.The function of rural cooperative organization showed a professional and segmented characteristic of productive service industry. According to the conclusion of analysis, the recommendations to promote rural cooperative organization development that were strengthening the fiscal and financial support, improving the laws and regulations system, establishing the supervision and risk security mechanism and strengthening the level of human resources were put forward.