Based on the theory of the reverberation chamber(RC) and the characteristics of its numerical simulation,two kinds of algorithms in frequency and time domain are compared.The methods for the simulation's validation are discussed.The status of simulation research in frequency domain is reviewed.The way to implement the finite-difference time-domain method(FDTD) to simulate a RC is elaborated,which method can achieve broadband and frequency-stirring simulation if a suitable excitation source is applied.The disposal of losses is pointed out as a key procedure of the RC's simulation in time domain.The computation time is compared between two kinds of algorithms