Abstract: In this paper the pressure transmit and equilibrium process during scanning pressure taps by the scanivalve system are discussed, and a concept of the curve of scanning speed behavior is proposed. It reflects that there is certain relationship between the scanning speed and accuracy of pressure measurements at a given scanning pressure ratio. A method and equipments to measure the curve of scanning speed behavior are given in this paper. Thus the scanivalve user can easy select the. proper scanning speed under required accuracy of pressure measurements from these curves of scanning speed behavior. According to the scanning behavior curves, the principle of how to arrange the scanning order of presure taps on the model is also given.