With an effective two-site Hubbard model, the dynamic behaviors of an exciton confined in coupled double quantum dot system driven by high AC field are investigated. Solving the Floquet equation by the perpeturbation theory, we obtain the analytical solution of quasi-energies. The calculation shows that the quasi-energy levels versus the amplitude of external field can develop into a series of resonance point. Calculating the time evolution of the initial states, we find the initial localized state can hold on forever at the resonance point. This demonstrates that it is possible to control the entangled states on extremely short timescales using the appropriate AC field with the adjustable amplitude and frequency, which may be useful for quantum information processing.