The architecture drawing CAD system based on data base comprises several models, including the functional-parts, self-defmed, the plane-graph design, the section & elevation-graph design and the query and management on architecture engineering data base. This paper introduces the structure, the function of each model and the characters of this system. The design method of this system isup-to- down which refers to gen eral process on architecture drawing design. A piece of drawing can be designed by dividing...