In order to reveal the internal relationships between the symmetry change and the invariant under the small disturbance,the perturbation to the Noether symmetry and adiabatic invariants for Lagrangian systems on time scales are studied in this paper.The differential equations of motion,the Noether symmetry and exact invariant for Lagrangian systems on time scales are presented.The definition of the adiabatic invariant on time scales is given,and the perturbation to the Noether symmetry and adiabatic invaria...