Abstract: A new special graph. design language-GDL is presented. This language is a system language. The system is a graph process system of sound and optic device. It is developed by us and called GDL system. In GDL, there are plehtiful methods of graph description, powerful ways of function' expression, and various statemects of graph design. GDL is a LISP-like language.The compiler of. GDL has been programmed and utilized with the running of GDL system.