This paper develops a self-organized dynamic network model based upon the network's self-organization natures.In this new model,network behavior is treated with nodes' trade-off between the value of information and the cost of establishing link,and the evolvement of network is described as a convergent stochastic process.The paper gives a detailed deduction for the possible result of network evolution.It should be pointed out that PGP(pretty good privacy) certificate network is a good example of this model.Furthermore,according to the change of parameters of the model,the self-organized evolvement exhibits multiform possible results.This phenomenon is consistent with self-organized criticality theory.The work provides a new method for the topological model research and self-organization theory in computer network.