The Quantum Entanglement System consists of two modules: the quantum optical path module and the coincidence counting module. The optical path module features an entangled source optical path mounted above the base, covered with a transparent acrylic shield for easy observation of the optical path and device operation status. The acrylic shield has square slots for convenient adjustment of polarizer angles and circular openings serving as wire feedthroughs. The acrylic shield is fixed to the mount with screws and can be removed for optical path adjustment. The coincidence counting module contains single-photon detectors and a coincidence counting board internally. It can be connected to the optical path module to perform single-photon detection and coincidence counting.