Reed mark of woven fabric was studied using image analysis and Fourier transform. In the Fourier power spectrum, the half width of the peak and the area of peak were proposed as evaluation parameters for quantifying reed mark behavior. The effects of weaving parameters on the need mark behavior were discussed in terms of cloth structure formation process. To support theoretical interpretation, the effect of weaving parameters on the cloth fell fluctuation and on the mean velocity of fabric at beating was also investigated.