Abstract : This study concerns information seeking and use models for professionals and their evolutions essentially, i.e. Information Access Practices. Coming from Anglo-Saxon literature, this new research trend evolves with the development of information science paradigms. So different information seeking and use models emerge in order to explain how professionals seek information and what can be done in order to help them. Two main categories can be distinguished: information seeking and use models versus the information retrieval models. So we will present today these models' diversity and we will evaluate them in order to see if a convergence is possible with the same vocabulary and procedures.