It discusses the creation and performance of the Department of Informatics of the Unified Health System, a Brazilian public agency subordinated to the National Health Foundation. It discusses the aspects related to the right of information to the people assisted, about their own health. It also analyzes the information infrastructure of DATASUS and its relationship with data management in health information. Exploratory-descriptive research, uses bibliographic and documentary procedures for data collection and quantitative and qualitative approach for data analysis. It suggests that Brazilian librarians engage in activities to promote informational competence in health and therefore recommends support in the good practices, models and infrastructures existing in DATASUS
