The Social Service in the company, for example, is closely on to the rules of law that all enclose the positive order of the State (in an inferior plan), that they go since the complementary laws, accords, collective conventions of work, until the ordinativos expedients, whose aspects represent only bureaucratic questions, guarantee of attendance the minorities, to the workers. Through the planning idea as a process carried through with the popular participation, the call can be reached distributive justice, that must be used for concretion of the social rights through with priority public services that will be indicated by the proper society, through its participation accomplish, reaching one of the objectives of the Brazilian Constitution of 1988, that it is social justice. However, to more good understand the meaning of these constitutional ruleses, it is necessary that let us make an analysis of what is rule of law, in its technical meaning of the word, therefore, this only exists when the written norm is constituent of right, that is, when it introduces something of new in obligator character in the legal system in vigor, in to be able direction to discipline individual behaviors or public activities (that she contemplates the field of the relations human beings). As the social assistant is a professional endowed with legal knowledge and legal-social apparatus, she is the professional who reaches palprrimas more social classrooms transmitting social knowledge concerning laws, rights and norms. We have that the law is a general rule that emanates of a competent authority, that is imposed to the society and must be obeyed by all, having to be widely spread out through the social service for the knowledge of all the population so that less the most informed or kept out of society they do not run of risk to commit any crime due to legal knowledge. However, all the apprehended legal apparatus during the course of Social Service for improvement of the quality of life is not only for the relations user-institution, is also for he himself in the incubency of its attributions.