Our main interest in this work is to characterize certain operator spaces acting on some important vector-valued function spaces such as (Va) a∈A c 0 , by introducing a new kind basis notion for general Topological vector spaces. Where A is an infinite set, each Va is a Banach space and (Va) a∈A c 0 is the linear space of all functions x: A → S Va such that, for each ε > 0, the set {a ∈ A : xa > ε} is finite or empty. This is especially important for the vector-valued sequence spaces (V i ) i∈N c 0 because of its fundamental place in the theory of the operator spaces (see, for example, [12]).