Given a set $Q$, we introduce the notion of $Q$-fuzzy subalgebras of BCK/BCI-algebras, and provide some appropriate examples. Using fuzzy subalgebras, we describe $Q$-fuzzy subalgebras. Conversely, we construct fuzzy subalgebras by using $Q$-fuzzysubalgebras. How the homomorphic images and inverse images of $Q$-fuzzy subalgebras become $Q$-fuzzy subalgebras is stated.