Adhering to the "administration in accordance with the law, comprehensive coverage, openness and transparency, quantitative evaluation, dynamic supervision, encourage progress" principle, and actively promote the food safety supervision of food service quantitative grading management; strictly in accordance with food safety laws and regulations and other requirements for food service licenses for food safety supervision of all types of food service units to carry out quantitative grading management; establish scientific and standardized evaluation criteria and procedures for timely publicity of food safety supervision of food service units to the community. Supervision of quantitative grading management; the establishment of scientific and standardized assessment standards and procedures, timely publicity to the community food safety supervision of food service units quantitative grading, accept social supervision, to ensure openness, fairness and justice; to encourage food service units to strengthen food safety management, improve food safety grading of food service, and to encourage the regulatory authorities to rationalize the allocation of regulatory resources, and strive to improve the effectiveness of supervision and level.