Traditional fiber-optic gyroscopes employ classical light as their light source，and the phase detection sensitivity in classical interference is ultimately constrained by shot noise and cannot be improved further. Methods for further improving the accuracy of fiber-optic gyroscopes have been investigated. By utilizing the correlation characteristics of quantum entangled photon pairs through the adoption of the maximally path-entangled state（2002 state），the phase detection sensitivity in optical interferometry can be enhanced by a factor of √2 compared with the shot noise limit，thereby achieving the Heisenberg limit. An integrated two-photon entanglement-enhanced fiber-optic gyroscope system comprising a high-efficiency entangled photon source，an all-fiber Sagnac interferometric optical path，and a coincidence detection system was designed and implemented. Rotation experiments were conducted using this integrated system，with experimental data acquisition and complete interference waveforms determining the relationship between the rotation rate and photon counts. The experimental results demonstrate that this system can be effectively applied to principal verification experiments and functional testing of two-photon entanglement-enhanced fiber-optic gyroscopes.