This　paper　presents　a　method　to　calculate　the　geometrical　parameters　of　the　ground　pixels　in　remote　sensing　image　for　BRDF.　Relationship　of　the　geometric　position　and　orientation　between　the　ground　pixel　(such　as　pixel　location,　slope,　surface　height　etc.)　and　sun-sensor　is　discussed.　Calculations　show　the　effects　from　zenith　and　azimuth　angles　of　the　pixel　towards　the　sun　and　satellite　sensor,　and　other　geometrical　parameters　of　BRDF.