A method of stored grain quality safety traceability based on the internet of things was provided. Each batch of grain was encoded according to the coding rule.The receive and deliver of grain and daily safekeeping information, especially the quality information, was collected by radio frequency identification（RFID）, sensors, and so on. The information was analyzed, displayed in the form of graphics from different viewing angles, and generated a traceability report as a result. This method was proved easy to use and effective in application，which could settle the problem of the traceability of inner-warehouse grain quality safety, and takes an important step for traceability of grain from farm to fork.