Based on the spatial analyses of GIS, the normalized factors are overlapped and reclassified using expert know ledge. Accordingly, quantitative computation is performed and the aided information is provided for the dec-ision of the monitoring netw ork layout of soil and water loss on the Loess Plateau in China. Af ter the existed mon-itoring stations are fully considered, 138 new stations are laid by combining the first level control stations with second level local control stations under national regulations and specificat ions on the arrangement of monitoring stations of soil and water loss.