The research tackles the topic of Limits and Bases in epistemic sociology. Limits were triggered in the mind of the researcher and inspired by the bases according to construction, Narration and truth.The limits and bases formed within social epistemic dualism gave rise to scientific and methodological roles framed by thought and sociology.The research ends with presenting two field studies to prove what has been employed of limits and bases in them.This research is, in general, a theoritical in the social theory. It relies on bases, facts and pieces of information, some derived from the theoritical literature of sociology and others from history, philosophy in addition to the researchers opinion accumulated from his humble knowledge.The research can be summarized by the following descriptive scheme: Judging the existence of social and epistemic dualism, which takes the form of the final formula of social experiment according to the philosophical language-, is the picture of material (which is society).In the lourse of this research, the dimension of dualism have been made clear by specifying the epistimic and idiomatic meaning of limit and base as a first attempt to specify a methodology for epistemic sociology. This is conditioned by the dualism following two framewoks:The first is the society. It is the real existence and the source from which facts and experiments are derived to be formulated within the framework of thought (the second framework of the dualism).The research was able, at the end, to formulate the content of bases and limits within the framework already explained.