A systematic study on effective and efficient instruction how to use FORTRAN with A personal computer was carried out in the field of information engineering. Best method of guidance, which enabled students to understand how to use FORTRAN swiftly and exactly, must be developed , since suitable guidance gave them efficient leaning effect. The most rational way to make program and put it into practive in leaning of high grade of programming language was discussed from a view of computer science. Some attempts were conducted to a quire a concise knowledge of FORTRAN. Appropriate indications were given from the new system so that students might learn steadily and solve problems in case they occurred. Proper and adequate guidance of how to use FORTRAN, explanations were made intelligibly, politely step. Regarding how to use FORTRAN, explanations were made intelligibly, politely and repeatedly by this system, even begineers were able to learn it by themselves. FORTRAN was studied precisely and effectively by using the new system developed in this study.