Abstract: Abstract: The adjustment models with criterion containing parameters include the semi-parametric model, the regularization model and the Vondrak filtering model, etc, which can be considered as supplements and extends of the Least Squares (LS) model. The key problem of these models is how to choose the parameters in the criterion. Many methods have been suggested by now, but united theory still not be formed. In this paper, a new method with virtual observations is proposed to solve all the models here, which can be used to choose the proper parameters of all the models and get the solutions of them. To compare with the LS model and other models, an example is presented to illustrate the feasibility and advantages of this method.