Abstract: The changing trends of temperature and pressure can be considered as the process
of gradient solution during the research of optimization of scalar field. Generally scalar field
mathematical model can be considered as curved surface equation. In this paper the research of
parabolic gradient is done by the graphic method. Mathematical expression is constructed, then
the parabolic gradient is shown by Visual Lisp in AutoCAD.

Key words: computer application, parabolic, gradient, graphic method, visualization