At Department of Mechanical Engineering Tokyo University, about 90 students take the subject "Manufacturing Exercise" in one team. We divide the students into 2 classes, and in each class, 8 groups are constructed, 5 to 6 students belong to each group. Under the guidance of setup in the Optical understanding of principle Spectrum and study on diffraction Spectrum can be applied to the mechanical engineering in this paper the authors are reporting on Optical instrument in the students manufacturing Exercise