The present paper concentrates on overcoming the deficiency of whole bridge aero-elastic wind tunnel test in the acquisition of dynamic stress of bridge elements.Based on both the whole bridge aero-elastic wind tunnel test and finite element method,some research is implemented with the hanger of Jiangdong Bridge as an example.Firstly,verification analysis for displacements is made on results derived from the above two approaches.Thereafter,regression equation is deduced from finite element method under zero yawed angles since the mid-span vertical displacement time history keeps high correlations with the hanger axial forces.Furthermore,displacement time histories of the mid-main span are sampled from wind tunnel test under different yawed angles.Lastly,with the help of regression equation and wind tunnel test results,the hanger’s dynamic stresses are obtained.Research shows that the regression equation in this paper has a significant regress effect in the 95% confidence interval.It is concluded that estimation method in this paper makes up the shortcoming of wind tunnel test for not being able to get structural stresses,and avoids several procedures in finite element method analysis under skew wind excitations,such as the identification of aero-elastic parameters and its complicated framework.