Objective To construct an evaluation index system for foodborne disease surveillance system in Beijing， and to provide reference foodborne disease system evaluation in Beijing.Methods Based on the actual situation of foodborne disease surveillance in Beijing， the evaluation index framework was established through literature search， and the Delphi method was applied to the index system for two rounds of expert consultation， and finally the three-level evaluation index system of foodborne disease surveillance system was established.Results The evaluation index system of foodborne disease surveillance system was divided into three levels， including 3 primary indexes， 24 secondary indexes and 94 tertiary indexes. The indexes are sorted by weight， and the primary indexes are the monitoring system structure and function （0.402 3）， the monitoring system operation guarantee （0.321 5）， and the monitoring system performance （0.276 2）. The top 3 secondary indexes were monitoring definition （0.065 0）， monitoring purpose （0.063 1） and monitoring content （0.059 3）. The top 3 third-level indexes were food-borne disease case definition （0.032 7）， food-borne cluster case definition （0.032 3） and active surveillance case definition （0.031 0）. The average score of importance of each index was 7.68 （5.62-9.18）， and the average coefficient of variation was 0.21 （0.11-0.39）.Conclusion The index system established in this study covers the structure and function of the surveillance system， monitoring performance and operation guarantee， etc. The research method is appropriate and the results are reliable， which has reference significance for the evaluation of foodborne disease surveillance system in other regions in the future.