Abstract: Abstract:〖WT〗With the progress in computer technology field,the development of modern science and technology has a close connection with computer.In the information optics research field,the processing of optical wave propagation and optical information with the computer numerical analysis method is a fundamental subject.But the numerical computation of diffraction theory is not described enough in the current textbook or monograph of information optics,and cannot meet the request of graduate,undergraduate student and engineer technicians.Based on the experience of teaching and international research cooperation in the past 30 years,the author had introduced the numerical computation theory of diffraction and the theoretical formulas of generalized diffraction in teaching of information optics.Meanwhile,the textbook “information optics coursebook” is published,and a better response is received .In this paper,history of information optics teaching is reviewed,and then the feature of the textbook “information optics coursebook” is introduced,at last,a typical example of computing the wave field ,which is through a paraxial optical system ,with Collins formula is presented.