The political philosopher Nancy Fraser is recognized as an important exponent of contemporary Critical Theory. Mainly known for the debate with Axel Honneth about the theory of recognition, her formulations give important contributions to at least three fields of social thought: the feminist theory, the political sociology of social movements and the philosophy of Justice. Aiming at a systematic reconstruction and critique of theoretical evolution of the author, it is considered here a wide range of writings dated from 1980 to 2012.In the study of a philosopher who always prioritized short texts and essays published in academic and political journals to large monographic systematizations, it is possible to identify two major critical models that lead to many diagnosis, critical concepts and emancipatory perspectives. To describe them, I use a methodological classification of her writings in three thematic blocks. The first one is about the "politics of needs interpretation" model, which mobilizes concepts such as discourse, democracy, hegemony, public sphere, citizenship and need.The second is about the theoretical concepts and empirical analyzes regarding the subordination of women and feminist struggles, which is visible through the entire production of the author; here, it is possible to highlight the dialogue among the various theoretic currents: Frankfurt School, post modernism, post structuralism, pragmatism, discourse theory. The third thematic block, finally, brings the model toward a Critical Theory of Justice, proposed in close connection with the political praxis of social movements; here are developed concepts as participatory parity, recognition, redistribution, representation, transnationalization and structure of governance.Considering the thematic and conceptual oscillations along Fraser's philosophical course, the research seeks to understand the original contributions and inevitable limits observed in her social thought, intending to participate in the critical theory of contemporary societies and to contribute to understanding and overcoming the injustices present in them.