The temporally sequential thermal relaxation model is proposed, in which the Fourier thermal diffusion mechanism is coupled into the two-temperature model for investigation of the full temperature evolution (fs～ns) in Au films under shaped femtosecond laser pulses excitation. The termperature field relaxations in Au films are obtained by solving the model. The studies clarify the roles of different thermal relaxation mechnisms in femtosecond laser heating of metal, which have the significance for optimizing ultrafast heating processes during femtosecond laser micro-and nanofabrication.