Let S be an ordered semigroup. In this paper we first introduce the concepts of (is an element of, is an element of Vq(k))-fuzzy ideals, (is an element of, is an element of Vq(k))-fuzzy bi-ideals and (is an element of, is an element of Vq(k))-fuzzy generalized bi-ideals of an ordered semigroup S by the ordered fuzzy points of S, and investigate their related properties. Furthermore, characterizations of regular ordered semigroups by the properties of (is an element of, is an element of Vq(k))-fuzzy left ideals, (is an element of, is an element of Vq(k))-fuzzy right ideals and (is an element of, is an element of Vq(k))-fuzzy (generalized) bi-ideals are given.