According to the tracking and tracing requirements of food supply chain management and quality and safety, using Internet of Things technologies, referring to the EPC standards, a food security information system platform model that based on Internet of Things and service oriented architecture has been put forward. The design describes E-R model, network architecture, technology framework and functional modules of achieving food tracking management by RFID technologies on the basis of Internet. Detailed electronic trace information about food could be inquired through Web Service or intelligent mobile phones or other devices.