Abstract: An object-oriented program of the finite element method was designed by utilising FORTRAN90 program language and conjugating with the AutoCAD Drawing Exchang file-DXF. Runing availabe program at present. We are implementing preprocessor and post-processing function, including mesh generation automatically, element-node informatiom,equivalent node forces,constrained condition and deformation, stress diagram etc. It overcome shortcomings of necessary of input a mass of date and treat output results date in past the FEM teaching. Meanwhile we attain aim of visibility about preprocessor and post-processing.Let students primary learn the FEM technical of Object-Oriented Programming.