Research in the scientific discipline of Social Work has been a constant since its birth as a profession thanks to the work done by Mary Richmond that justifies with a research carried out for more than 15 years, over 2,800 cases of the professional practice of the Charity Organization Society (COS), what is the methodology to follow and also justifies that Social Work is a profession to have a unique role. This profession uses in its origin different research modalities that have gone unnoticed. The most direct consequence of these circumstances has led certain people to think that Social Work does not have its own research methodology and, therefore, it must take it from other social sciences. The general is to analyze the contributions of Mary Richmond in current research in Social Work, to highlight her investigative capacity, the validity of her intervention processes and show their usefulness to this day. A bibliographic review has been carried out in the main scientific databases in Spanish, English and Portuguese, from 1994 to 2018; taking as reference the methodological criteria of Arksey and O'Malley (2005).Among the conclusions that are reached is that the recognition in the research capacity of this profession in its history goes through the accreditation of the instruments used by the main authors of the profession.