In nature, there is an interaction between all living beings that allows them to navigate in all the diversity of the world. Thanks to this information, the organism defines any reality as similar, opposite or indifferent, thanks to which organisms survive in the surrounding world.This interaction (communication) is called the semantic field in ontopsychology.Man lives inside the information universe. Semantic information is a life message, it is an aspect of continuity between a person and the whole, an aspect of the joint development of a person and the environment.The book presents a systematic presentation of the scientific works of Antonio Meneghetti on the problem of the semantic field.In The publisher's layout of the book has been saved in PDF A4 format.