Book Мухаммада Бакира ас-Садра "History of 'илм аль-усул" is sanctified to the study of the questions, related to the origin of science about principles of jurisprudence the study of that is equipotent to preparation to understanding of Islam Law. Author in detail and consistently expounds essence of studies about principles of jurisprudence, that is more fundamental, than science of jurisprudence. Betweenness by jurisprudence and science about her bases like a betweenness by logic and philosophy. Wishing to grasp one of them, it is necessary in the beginning to become familiar with other, being her source.A book will be interesting to the teachers and students of исламоведческих faculties and all, who is interested in islam jurisprudence.