The analysis of the dynamics of dialects and its close connection with the learning of their genesis, tightly linked up with their history, is considered in the article. The history of the dialect as the central object of the analysis of the dialect genesis gives the information about the ways of the society formation, making and type changing (transformation) of the conversation features, i.e. it is closely related to the external and internal history of the dialect. The facts of the external history are very important for understanding the general character of the dialect, including the information abour the presence or absence of its inhabitants´ contacts with other dialects representatives, which are recorded by historical sources. The internal history of the dialect is identified by the analysis of the information about the state of speaking from different chronological periods (if they are), new-made linguistic events, which record the dynamics ot the system - any synchronized event may be directed into diachrony. Written sources can´t record all the events of the conversation, so the facts from different chronological periods about definite events of the conversation are determined by the volume of the information. We can speak about two interconnected directions of dialect research. They are following: specific research of phonological, morphological, lexical or syntactical changes of dialect systems, and designing general directions of the dialect evolution.