The invention discloses a high-quality rice harvesting and storing operation 5T management system based on the Internet of Things technology. The system comprises a field management information module, a field management information module, a drying management information module, a warehouse management information module, a grain condition monitoring information module and a data center. The fieldinformation, the field information, the drying information, the storage information and the grain condition information are transmitted to a data center through the Internet. The information is summarized, converted and stored through the data center. The data center can transmit an instruction of an operator to the field management information module, the field management information module, thedrying management information module, the warehouse management information module and the grain condition monitoring information module. The invention further provides a high-quality rice harvestingand storing quality evaluation method based on the Internet of Things technology. The possibility that cracks and micro cracks are generated in rice grains can be minimized through effective time management and key index control.