From the view of integration of the stability assessment and control design of landslide engineering, the paper constructed the total structure of the computer-aided system of slope engineering integration design, elaborated the design method and main functions of computer-aided system of the pre-processing module, the core calculation module, as well as the post-processing module. Based on this, and visualized programming language Visual Basic for the foundation, and using CAD secondary development as the platform for graphics output and Excel as databases with component technology, the computer-aided system of landslide engineering information design was developed. Finally, taking some landslide integration design in Tongliang County of Chongqing City for example, the system feasibility and reliability were confirmed.