In this paper, the temperature specturms of relaxation-modulus for PMMA are given by dynamic and static experiments under constant strain-rates. The spectrums are transformed to the temperature spectrums of loss-modulus, and are compared to the temperature spectrum of loss-modulus in various frequents obtained by internal friction experiment. Furthermore, we get the corresponding relations in two experiment conditions, and demonstrate the relations between strain-rate-sensitivity peak and lossmodulus peak i...