In view of the situation of auto industry, a system platform is given based on ASP and SRM. For the Co-management and information exchange of SRM, dynamic co-mode and estimated principium are designed. Based on four influence factors of auto industry, focuses on the process of supply not the result. Based on problem definition, formulation of criteria, qualification and choice, the process of estimate is improved. Implementation result shows that this kind of system platform can improve the efficiency of information exchange and achieve the goal of Co-management.