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We investigate the quantum coherence and quantum entanglement dynamics of a classical driven single atom coupled to a single-mode cavity.It is shown that the transformation between the atomic coherence and the atom-field entanglement exists,and can be improved by adjusting the classical driving field.The joint evolution of two identical single-body systems is also studied.The results show the quantum coherence transfers among composite subsystems,and the coherence conservation of composite subsystems is obtained.Moreover,the classical driving field can be used to suppress the decay of the coherence and entanglement,owing to considering the leaky cavity.The non-Markovian dynamics of the system is also discussed finally.