In this paper, we define and consider, the category FPos-S of all S-fuzzy posets, and action-preserving monotone maps between them. S-fuzzy poset congruences which play an important role in studying the categorical properties of S-fuzzy posets are introduced. More precisely, the correspondence between the S-fuzzy poset congruences and the fuzzy action and order preserving maps is discussed. We characterize S-fuzzy poset congruences on the S-fuzzy posets in terms of the fuzzy pseudo orders
