In the present paper, we mean a sequence of maps along a sequence of spaces
by a non-stationary dynamical system. We use an Anosov family as a
generalization of an Anosov map, which is a sequence of diffeomorphisms
along a sequence of compact Riemannian manifolds, so that the tangent
bundles split into expanding and contracting subspaces, with uniform bounds
for the contraction and the expansion. Also, we introduce the shadowing
property on non-stationary dynamical systems. Then, we prepare the necessary
conditions for the existence of the shadowing property to prove the
shadowing theorem in nonstationary dynamical systems. The shadowing theorem
is a known result in dynamical systems, which states that any dynamical
system with a hyperbolic structure has the shadowing property. Here, we
prove that the shadowing theorem is established on any invariant Anosov
family in a non-stationary dynamical system. Then, as in some applications
of the shadowing theorem, we check the stability of Anosov families, and
also we peruse the stability of isolated invariant Anosov families in
non-stationary dynamical systems.