Nowadays,　direct　current-drive　(DC-drive)　is　the　mainstream　method　of　driving　electroluminescence　(EL)　devices　such　as　quantum-dot　light-emitting　diodes　(QLEDs).　In　contrast,　alternating　current-drive　(AC-drive),　as　an　alternative　to　DC-drive,　has　achieved　lots　of　significant　research　results　in　recent　years.　And　AC-drive　is　expected　to　reduce　equipment　manufacturing　costs　by　reducing　the　use　of　power　converters　and　rectifiers.　However,　our　understanding　of　the　light-emitting　mechanism　for　QLED　under　AC-drive　is　still　not　thorough.　In　this　work,　the　optoelectronic　characteristics　of　QLED　under　different　AC-driven　frequencies　are　systematically　studied　and　the　equivalent　circuit　model　is　proposed　by　combining　the　experimental　results　with　simulation　results.　Moreover,　the　working　mechanism　of　the　equivalent　circuit　and　the　carrier　transport　model　are　explained　in　detail,　especially　under　high　frequencies.　This　research　helps　us　deepen　our　understanding　of　the　working　mechanism　of　QLEDs,　broadens　the　application　fields　of　AC-drive,　and　paves　the　way　for　the　further　use　of　AC-driven　EL　devices.　0741-3106　©　2021　IEEE.　Personal　use　is　permitted,　but　republication/redistribution　requires　IEEE　permission.　See　https://www.ieee.org/publications/rights/index.html　for　more　information.