The invention relates to a meter reading system of a wireless intelligent meter. The system comprises the intelligent meter, a subnet relay, a collector, a concentrator and a master station server, wherein the intelligent meter collects and sends data of use levels of intelligent meter users, the subnet relay transmits a reading management command and the data of the use levels of the intelligent meter users, the collector establishes a subnet, collects the data of the use levels of the intelligent meter users, and transmits the reading management command, the subnet relay transmits an ultrashort management command and the use levels of the intelligent meter users, the concentrator establishes a main network, collects the data of the use levels of the intelligent meter users and transmits the reading management command, the master station server generates and sends the reading management command, receives the data of the use levels of the intelligent meter users and analyzes and manages the data. The subnet relay provided by the invention can relay and transmits the data of the use levels of the intelligent meter users, sent by the intelligent meter, when the number of the intelligent meters is great, so that the problem that in the subnet, the volume of the data of the use levels of the intelligent meter users, sent by the intelligent meter farther from the collector, is easy to lose is effectively solved. The system has the advantage of strong reliability.