Abstract: The measurement of the unsteady behavior of nominally two dimensional turbulent flows in regions of separation and reattachment is facilitated by the development of a new measuring system.The features of the system are. 1.The size of the wallflow-direction probe is smaller,the diameter of the probe is only 15mm.2,The probe and its control circuits are all made in China and are relatively inexpensive and easy to construct.3, The measuring accuracy in wall region is higher than the measuring results of using Laser Doppler Anemometer.