The food safety traceability system was first established and perfected by the European Union in response to the problem of "mad cow disease" in 1997. This food safety management system is promoted by the government, covering the upstream and downstream of the whole food industry chain, such as food production bases, food processing enterprises, food terminal sales, etc., and sharing information through special hardware equipment similar to the bank ATM system to serve the final consumers. Once there is a problem with the quality of food on the consumer side, you can make an online inquiry through the traceability code on the food label to find out all the circulation information of the food production enterprise, the origin of the food, the specific farmers and so on, and clarify the corresponding legal responsibilities of the accident party. This system is of great significance to food safety and self-discipline of food industry.

the establishment of food safety traceability system is driven by the government and realized through the participation of all parties in the food industry chain. It mainly includes: agricultural products production base, beef cattle breeding base, slaughtering and processing enterprises, food processing enterprises, circulation enterprises, retail enterprises and final food consumers.

the establishment of food safety traceability system depends on information technology related to the internet of things. Specifically, all kinds of hardware devices dedicated to food traceability are developed and applied to all parties involved in the market and interact with each other through networking, so as to transform, integrate and mine a large number of heterogeneous information, realize food safety traceability information management, and complete information collection, recording and exchange in many links such as food supply, circulation and consumption.

There are three kinds of current food safety traceability technologies in China: one is RFID radio frequency technology, in which a logo with a chip is attached to the food package, so that the relevant information can be automatically collected and read when the product enters and exits the warehouse and is transported, and the product flow direction can be recorded on the chip; One is the two-dimensional code. Consumers only need to shoot the two-dimensional code through a mobile phone with a camera, and they can query the relevant information of the product. The records of the query will be kept in the system. Once the product needs to be recalled, they can directly send text messages to consumers to realize accurate recall. There is also a bar code plus product batch information (such as production date, production time, batch number, etc.). In this way, food production enterprises basically do not increase production costs.