The concept of asymptotic smooth transformation was introduced by J. Hale [10]. It is a very important property for a transformation between complete metric spaces to have a global attractor. This property has also consequences on asymptotic stability of attractors. In our work we study the conditions under which the Zadeh s extension of a continuous map f : Rn ! Rn is asymptotically smooth in the complete metric space F (Rn ) of normal fuzzy sets with the induced Hausdorff metric d 1 (see Kloeden and Diamond [8] )