Journal of Digital Information Management Jian Ni, Xifei Wei 11 5 2013 http://dline.info/fpaper/jdim/v11i5/1.pdf The finite volume method combines the advantage of the finite element method and the finite difference method, while overcoming their shortcomings. This paper describes the development of the finite volume method and the process of using finite volume method for fluid calculations. Finally, this paper introduces the process of using improved finite volume method for solving the flow equations of NS.