Abstract: The adaptive sequential adjustment and the adaptive robust sequential adjustment are presented based on adaptive filtering and robust estimation principle.The estimation formula of the parameters for both the adaptive sequential adjustment and the adaptive robust sequential adjustment are derived.A numerical example is given.It is shown by the theory and calculation,that the adaptive sequential adjustment can balance the prior model information and the posterior observation information,and the adaptive robust sequential adjustment is not only simple in calculation but also can efficiently control the influences of the prior information disturbing of model parameters and the measurement outliers on the estimated parameters.