The aims of this paper is to describe and to analyze the use of a socioanalytical device as a data collection too as well as a space of professional practice and work relations analysis, with nurses from a School Hospital of the Minas Gerais Federal University, Brazil. The qualitative approach was chosen to develop an intervention research with Institutional Analysis as theoretical and methodological framework. In the first stage of data collection, an exploratory research was carried out through a questionnaire and, in the second phase, a socianalytical device was built in 5 meetings that took place during two months. For the nurses, the analysis device has enabled personal and professional growth; to review positions; to exchange experience and to reflect on their own problems through the experience of other colleagues. We conclude that the socioanalytical device was a space for discussion, for analysis of professional practice and was the methodological strategy for data collection in this research. It has allowed the creation and recreation of forms of intervention, the production of knowledge and has improved quality of health work.