Numerology - a knowledge connected with numbers and their symbolics interested people worldwide since ever. The effect of those interests was developing of different kinds of numerology (Chinese, Weddic, Kabbalistic and Pythagorean).   Every each of them created a wide system of characteristics of people and surrounding environment. But since the Pythagorean numerology with the change method of Gladys Lobos exists, it is possible to eliminate the problems' cause. A human as a social being needs not only an individual development for a harmonic functioning but also a positively created environment. Using the numerology rules it is possible to influence the environment with a conscious impact (working or learning). Using numerology gives good results in professional activities as starting a new company, making deals, applying for something etc. Another field on which numerology is a perfect solution is therapy. Symbolics of numerology makes the diagnosis easier as well as working with the problem onwards. Despite the fact that not every person reaches the point of radical changes of a correction of a numerological portrait, just getting conscious of a need of development makes the work with the problem easier. Numerology may be useful with any kind of interaction. A knowledge of the features of the partner's characteristics makes life together easier and gives the motivation for working on the relationship. But the greatest advantages numerology brins to developing the child's development as upbringing the child the right way (knowing his or her character's features) is essential for his or her adult's life.