Abstract: A method of dynamic finite element modeling of structure system using measured modal parameters （natural frequencies and mode shapes） of lower orders is presented in this paper. The finite element model is expressed by element mass and stiffness parameters, which are determined by minimization of weighted Euclidean norms of orthogonality conditions and characteristic equations. Using this method, the problem is reduced to solving linear algebraic equations. The number of structural parameters to be identified isn't many and the calculation is simpler. A sample problem is given to demonstrate the validity of the proposed method.