The study dealt with visual communication principles and didactics of advertising. The field of visual communication is very wide. This study focused on two-dimensional advertising because each area of visual communication has different conveying media and systems. The study has three goals. The first goal is to define the principles of visual communication and their basic concepts ‘text’ and ‘image’. This problem is put out: The principles of visual communication are argued with W. Koch’s scheme and these are supported with the neuropsychological theory that the information in text draws the surface of the text, textual meaning and mental model in the brain. The second goal is to deal with the main concepts of visual communication argued with the terminology of ‘text’, ‘image’, ‘icon’ and ‘sign’ in the context of advertising and semiotics, and to bring the problem of didactics for visual communication. The study argues also about the problem of how to approach image and text analysis in advertising by students. The third goal is to take the text and image as a main learning subject and to build the foundation-stone of didactics for visual communication. The study argues and analyses the problems of layout with examples in advertising. The study will make a contribution to win the basic category for education of visual communication. And it will show how to introduce visual communication to schools and to orientate didactic problems with semiotic advertising.