Credibility evaluation is the important research content of fire numerical simulation.Theverification and the validation are the main method of credibility evaluation.In this paper,researchstatus aboutthe verification and the validation of numerical model were summarized,and then the primary processes of verification and validation were introduced including basic content and method.Take example of Steckler house fire test,Validation research on FLUENT soft in the fire simulationwas presented.Finally,some comments were made with respect to the development of VV of fire numerical model.