Objective To evaluate the implementation efficacy of the food sanitary supervision on public notification system(PNS)in school cafeterias in Luoyang city. Methods Quantitative grading evaluation of food service and licensing of catering services,quantitative evaluation of health and hygiene management were made in 90 school cafeterias in Luoyang city,2013.According to the results,the food sanitary supervision on PNS was implemented.The evaluations of the index of the canteen were made again in those cafeter...