The article includes the description of the content and realizing process of author theoretical approach to evaluate of the economic efficiency of institutional changes with regard to industry markets; this is the innovative sight on the method of the institutional environment dynamical analysis. The realizing process of sought method represents the definition of limitations of the industry market, assignment of the economic subjects and description of its institutional environment, exposure and analysis of institutional changes, modeling of the economic efficiency of institutional changes. Eventually, the gradual analysis of institutional changes efficiency on the ground of offer model allows seeing what subject of industry market is a receiver of most profit and who has the vast losses. Therefore, it is possible to carry out such a change of the institution, which will contribute to a more even distribution of benefits and losses so that none of the economic subjects of the industry market was the recipient of net losses and none of the groups of economic subjects did not become the owner of a significant gain. So, a comprehensive analytical tool for the identification and economic analysis of institutional market changes can directly solve the problems of applied institutional analysis of industry market interactions.