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Bridge engineering is playing an increasingly important role in our daily lives, also along with it, we have a lot of problems. As a major research topic, bridge construction monitoring is a matter with difficult and complex. However, the monitoring of bridge relates to the bridge force is reasonable and the design requirements of linear. It has a significant impact on healthy operation after the bridge is done. Therefore, the bridge construction project monitoring is an important aspect which is can not be ignored.In this thesis, we use the evaluation method after the bridge is done, with the projects which have been done, The success of the gray theory to practical engineering. With Predictor variables which is rational choose, we selected variables on the grey forecasting model. Being compared with the Structure calculation of the use of the software MIDAS / CIVIL simulation and theoretical values derived from actual projects in the measured values , then obtained corresponding conclusions.As a nonlinear system, the force and linear of bridge structures is affected by many aspects such as the temperature, environment and so on. However, these factors were often overlooked in calculation of the structure, It makes the calculation results is the large deviation from the actual situation. As a forecasting system, It filters a lot of factors on the structure, do not have too much care about the reasons for the structure. Meanwhile, we have the gray prediction model with less gray prediction data , predictive control is also more convenient. Based on the theory of gray system, we can know the grey system theory in bridge construction monitoring with high availability. While the gray prediction theory results to the results of our simulation analysis in line with the amendments to be well.Finally, we also make the prospect in the future of bridge construction monitoring with grey theory , and some issues are raised. We hope that the gray system theory what after a certain, it can be simulated on the finite element analysis software, also the appropriate amendments to facilitate a better alignment of the bridge span and stress monitoring
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