Abstract: The Bayes method is one of the basis of statistical decision methods. Through sampling, a prior distribution can be modified, hence the uncertainty of a parameter can be reduced. In harbor engineering, the numbers of the actual trial piles is nuall. It is difficult to obtain the exact estimation of Load-bearing capacity parameter for a single pile. In this paper, the Bayes method is applied considering the influence of subjective uncertainty on the load-bearing capacity as result is considered. The example given in this pap3r shows that the method is very useful in practice.