The invention relates to a logistics cargo wireless tracking method and system based on RFID. The method comprises the steps of manufacturing an RFID electronic tag, boxing, connecting information bya deliveryman, loading, positioning, transferring, distributing and arranging in the next stage, and recovering the electronic tag. According to the system, an RFID electronic tag is used for storingcommodity information, and issuing immediate location information, the RFID electronic tag is connected with the antenna; information in the RFID electronic tag is transmitted to the reader through the antenna; the reader transmits read information to the RFID server, the RFID server transmits the information to the event manager, the event processor transmits all data to the product database, theproduct database is connected with the terminal device, and the terminal device can call the information in the database at any time. According to the invention, based on the characteristics of low cost and rapidness and high efficiency of wireless detection of RFID, real-time detection is carried out on cargos transported by logistics, and related information is published to the cloud in real time for management and monitoring of consumers and workers.