The anthropic principle is fundamental scientific methods that can be used in science. First appeared in 1973, but quickly gaining a significant number of supporters - Eddington, Dirac and others. It is a methodological principle, which puts them in the limelight conditions for the existence of intelligent observers and using scientific methods to try to find answers on how its existence is possible. The traditional version notes especially large numbers of coincidences that arise when creating dimensionless ratios of fundamental physical constants. The relationships between constants and their explanation is thus one of the pillars of modern cosmology. Alternative explanations can then be different multiverse models or contest the actual significance of the existence of intelligent observer, such as a privileged element. Nevertheless, we can say that the anthropic principle is, especially in its weak variant of one of the cornerstones of modern science.