Based on the frozen-flow hypothesis, the theory of measuring average transverse wind speed was analyzed by using space-time cross correlation function with atmospheric coherence length monitor (DIMM). The best location of meteorological sensor is determined by the path-weighted function of scintillation and angle-of-arrival (AOA) fluctnations. Under the weak turbulence condition, the transverse wind speed was calculated by data of scintillation and AOA fluctuations which was carried out in the experiment of 1 km horizontal propagation path by DIMM. Some results were from the comparison between the transverse wind speed and the wind speed obtained by meteorological sensor. The wind speed obtained by AOA fluctuations has a certain correlation with wind speed acquired by meteorological sensor. The function of DIMM is expanded based on the experiment.