According to defined the texture as the measurement of image gradient of grey, two parameters can be obtained to describe remote sensing image quantitatively. They are tile texture intensity and the texture density. The texture intensity is used to show differences of one pixel with its neighbours, while the texture density is used to show the frequency of changes of grey level. In addition the relative gradient are defined to describe the texture characteristic of image from tile relative changes of grey level. The producted texture images from this method include both the information of space and part of information of spectrum. So the texture structures in the overbright and over-dark ranges can be shown obviously. In this paper, we also discuss how to select the size of the moving window.