Despite the numerous benefits of scientific practice to the world in recent years, the professionals and students of the Psychology are still resistant to the use of the scientific method in this area. The origins of such objections and the variables that influence them are uncertain, requiring studies to investigate them. The main idea presented in this study is that the conceptions of science and scientific method among Brazilian professionals and students of Psychology are insufficient. In order to test the hypotheses derived from this idea, the aim of this study was to evaluate the psychology professionals and student s conceptions about science and scientific method through two open questions and a sociodemographic questionnaire. The sample of respondents was composed of 791 people, students (n = 407) and professionals (n = 384) from Brazil, aged between 17 and 67 years (M = 29.07, SD = 9.02), 68,5 percent women. The analysis of the texts occurred through the Descending Hierarchical Classification and Correspondence Factor Analysis with the aid of the IRaMuTeQ, an interface of textual analysis. The analysis revealed that the participants have very different conceptions about science and scientific method, dominating the notion that science is a method of acquiring knowledge, but without more details about how this method works. It is important to emphasize the importance of learning about scientific methodology in Psychology courses.