In the first part is given an overview on fuzzy sets, fuzzy numbers, fuzzy logic. A detailed treatment of these notions is given in [1, 2, 3]. This synthetically presentation is useful in understanding and in developing the applications in economical problems.
In the second part some new or extended approaches of such applications are given. More precisely there are presented: a model of solving decision problems; an algorithm for the study the interactions between economic indicators and a method to establish the value of a company.