Local research. What for and how ? For fifteen years, LARES searchers have been carrying on researches in the changes of local society at Rennes and its surrounding. From that experiment, Armel Huet tries to define the conditions of a local research development from institutional and material means point of view as well as from scientific stakes for social science and their links within political field. For scientific development, local research in social science is at first of methodological interest, for contrary to the technics of pin-point classical surveys, it leads to the sharp and sustained study of society phenomena, of their local characteristics. In theorical and epistemological field, local research must avoid pitfall from stri...