Living society is surrounded by various automatic systems. The system design process is one of the important stages in designing an automated system. This indicates the importance of educating engineers capable of designing systems. However, in the learning process, there are difficulties in giving students an understanding of how to compile a ladder diagram with clear steps. There are difficulties in translating the requirements for the electrical system into a ladder diagram. Through this paper, we propose the Influence ladder diagram as a diagram that helps the process of teaching ladder diagram design. This diagram can be used for the teaching process as well as for the actual system design.