The method of interior design project in Brazil is the object of study of this research. Proposes to add the human factors in environmental design knowledge to existing design practices in order to contribute to the development of this profession. Mainly architects, designers and interior designers have practiced the interior design activity. It is believed that the principles of the human factors in environmental design can contribute to improvements in the preparation of projects. In this research, it is a review of the methodologies used by the professionals engaged in the interior design activity and is reviewed, the main methods used in ergonomics focusing on user analysis and in the environment. The aim is to verify through qualitative research with professionals and users, as in the design process of this activity, approaching all stages of the work. Revisions of existing methodologies, the results found in inquiries and analyzes, will serve as input for a proposed schematic modeling covering beyond the natural stages of the interior design project, ergonomic aspects of the human factors in environmental design.