The invention belongs to the technical field of bridge dead load stress testing, and discloses a concrete bridge dead load stress testing system and method and an information data processing terminal.The concrete bridge dead load stress test system comprises a bridge image acquisition module, a bearing acquisition module, a bridge prestress detection module, a main control module, a bridge modelconstruction module, a parameter import module, a simulation test module, an analysis module, a storage module and a display module. The real-time relationship between the tension strength (tension force) and the tension displacement is established through real-time measurement data by the bridge prestress detection module, the magnitude and uniformity of effective prestress are intelligently controlled, and the bridge prestress detection precision is improved; and moreover, the analysis module is used for obtaining the stress cycle data of a to-be-analyzed bridge through adoption of a data simulation method based on the actually measured traffic flow data of the to-be-analyzed bridge, the theory is scientific, the analysis result is scientific and reliable, the applicability is high, andimportant engineering significance is achieved.