A method and system realizing wireless communication between an instrument and a host computer

The invention discloses a method and system realizing wireless communication between an instrument and a host computer. A host computer, salve unit nodes and primary devices are comprised. The salve unit nodes are connected to the host computers through the primary devices and carry out communication with the host computer. The host computer sends data requests for the slave unit nodes to the primary devices through serial port communication. The primary devices obtain response information from the slave unit nodes of the present groups through wireless modules, and respond to the data requests of the host computer through the serial port module. The invention also discloses a method realizing wireless communication between the instrument and the host computer. Through the system and the method of the present invention, communication can be carried out between the host computer and the instrument through the wireless transmission, so that troubles of wiring are reduced and the cost is saved.