On the basis of the achivements of home and abroad,a study and fabrication of multi- module and multi- function intelligent design soft ware SBSDES has been completed successfully.The ES has been expounded systematically in the paper,such as knowledge- base, data- base,reasoning mechanism,graph function and user interface ,and so on.Finally,the SBSDES is used for design two roadways.The industrial tests show that SBSDES is scientific and practical.