In accordance with the present status of real –time measurement for agricultural machine in the field with burdensome in labors, unsafe in testing and backward in testing method.Wireless data acquisition system for testing based on LabVIEW is introduced in the paper. This system integrates sensor technology, WLAN technology, virtual instrument technology and measurement technology. Compared with running cables test, the Wireless Data Acquisition system becomes safe and easy for moving machine. This system can provide a robust, two –way, TCP/IP connection, which can be linked to the networks of Internet easily. For mobile test or bad- condition measurement, a wide application is pointed out in the end.