In order to help students and beginners of industrial engineering to learn disciplinal definition of industrial engineering and to choose themselves progressional directions, this paper is to review the developing situation of disciplinal definition of industrial engineering, todevelop disciplinal definition of industrial engineering, to set up course system of industrial engineering, based on the comprehension of industrial engineering and the experience in factories which comes from authors' long-term teaching and practice. Finally, a disciplinal definition of industrial engineering is described as an administrative skill system which adopts engineering viewpoint to plan, form, optimize various schemes of social organization activities, to establish, maintain, improve various system of social organization, to achieve operating targets of social organization, and raise benefit and efficiency incessantly. The disciplinal course system should include human-machinery engineering, manufacturing engineering, administrative engineering, information engineering, specialized engineering.