Social and economic diagnostics is a new scientific trend to research regional market phenomena and processes. Its emergence is traditionally connected with the synthesis of methodological economic researches and applied methods and procedures systems engineering, sociology, management, mathematical statistics and cybernetics. The word "diagnostics" means detection, determining the state of the researched object. The analysis of the scientific reserve on the problem of regional economy diagnostics testifies about the possibility to adapt it to the research of the foreign economic activity development of the region.