In　this　paper,　we　investigate　coherence　protection　of　a　quantum　system　coupled　to　a　hierarchical　environment　by　utilizing　noise.　As　an　example,　we　solve　the　Jaynes-Cummings　model　in　the　presence　of　both　a　classical　and　a　quantized　noise.　The　master　equation　is　derived　beyond　the　Markov　approximation,　where　the　influence　of　memory　effects　from　both　noises　is　taken　into　account.　More　importantly,　we　find　that　the　performance　of　the　coherence　protection　sensitively　depends　on　the　non-Markovian　properties　of　both　noises.　By　analyzing　the　mathematical　mechanism　of　the　coherence　protection,　we　show　the　decoherence　caused　by　a　non-Markovian　noise　with　longer　memory　time　can　be　suppressed　by　another　Markovian　noise　with　shorter　memory　time.　Last　but　not　least,　as　an　outlook,　we　try　to　analyze　the　connection　between　the　atom-cavity　entanglement　and　the　atomic　coherence,　then　discuss　the　possible　clue　to　search　the　required　noise.　The　results　presented　in　this　paper　show　the　possibility　of　protecting　coherence　by　utilizing　noise　and　may　open　an　alternative　path　to　design　noise-assisted　coherence　protection　schemes.