Provided is a universal weighing-free steel bridge swivel spherical hinge system. The whole system comprises a swivel spherical hinge portion and steel sand cylinder portions. The swivel spherical hinge portion comprises a pair of upper spherical hinge and lower spherical hinge, and the spherical surface of the upper spherical hinge is matched with the spherical surface of the lower spherical hinge. A planar abrasion-resistant plate is inlaid in a planar embedded plate groove. A spherical abrasion-resistant plate is installed in an annular duct pit of the upper spherical hinge, and the spherical abrasion-resistant plate and the lower spherical hinge form a rotation pair. Pulling cables are anchored to the upper spherical hinge through special anchorage devices. The swivel spherical hinge is connected with an upper swivel structure and a lower swivel structure through anchorage bolts. Each steel sand cylinder portion comprises a force measuring sensor arranged inside an upper cylinder body, wherein the upper barrel body is inlaid in a lower barrel body, the upper barrel body and the lower barrel body form a piston structure through quartz sand, and lifting hooks and sand discharging barrels are arranged on the periphery of the lower barrel body. The steel sand cylinders are disposed around the swivel spherical hinge as well as between the upper swivel structure and the lower swivel structure. The universal weighing-free steel bridge swivel spherical hinge system has the function of measuring the weight, eccentricity and bending moment for the upper swivel structure and is applicable to both steel bridges and concrete bridges, and the devices can be used repeatedly.