The invention provides a concrete creep testing system, which comprises a base, a lead screw, a top plate, an electro-hydraulic servo actuator, a strain gauge, a load sensor and a disc spring, wherein the bottom of the lead screw is fixed on the base; the top plate is fixed at the top of the lead screw; a movable lower pressure plate and a movable upper pressure plate are arranged on the lead screw; the disc spring is arranged between the upper pressure plate and the top plate; the load sensor is arranged at the bottom of the upper pressure plate; the strain gauge is embedded into a test piece; and the electro-hydraulic servo actuator is arranged between the base and the lower pressure plate. According to the embodiment, counterforce loading is realized by adopting the disc spring at the upper part of the test piece, and the electro-hydraulic servo actuator for loading is adopted at the bottom of the test piece, so that the creep property of the full-grade concrete can be directly measured, the creep property of the full-grade concrete is reflected truly, and the engineering design is safer and more reliable, economic and reasonable.