1.When the object with electronic tag is close to the microwave antenna, the reader sends out the microwave query signal.

2.After the electronic tag installed on the surface of the object receives the query signal from the reader, it reflects the data information in the tag back to the reader according to the command in the query signal.

3.After the reader receives the microwave synthesis signal reflected back by the electronic tag, the reader demodulates and processes the information such as the identification code stored in the electronic tag.

4.As the feature data of the object, the recognition information is transmitted to the control computer for further processing, so as to complete the application of information inquiry, charge, release and statistical management related to the object.