This article performs a diachronic analysis of the research works presented in the main events in the field of Information Science in Brazil. The research resorts to a scientometric method, encompassing, in the stages of survey, analysis and interpretation of the gathered data, both the social and historical environments of the development of this field in the country. It uses, as its source of information, the Grey Literature Database, in which a large part of the communications presented in events, is registered and indexed. It represents in graphical format and analyses the number of works presented in relation to the main themes of each episode of the selected events, between 1954 and 2008. It relates the indices obtained in each period to the historical and political context of the country, as well as to the context relating to the cognitive development of Information Science.