This work presents Cassirer's theory of symbolic forms, the theory of the symbolic system. The system of symbolic forms is a unique system through which Cassirer wants to explain the ways, possibilities and specifics of man's knowledge of the world. Through symbolic forms, a man build a world. Because of their peculiarities, symbols are man's necessary ways of communication with the world because he is "crussified" between stimulus and experiences. A symbolic system or symbolic chain is a progressive system that tries to explain man's entire knowledge. The symbolic forms that Cassirer singles out as essential for human knowledge are myth, religion, language, art, history and science. Each of these forms stands out in its own way, but also each previous symbolic form in some way influences the other. Nevertheless, each of the symbolic forms has its own independence and specific ways of development and movement, as well as that one symbolic form does not abolish the other, but only complements itself in the overall scheme of the symbolic system. Cassirer builds the theory of the symbolic system by a purpose to build a unique philosophical anthropology that provides answers to numerous questions about man.