In this paper,a high precision gas absorption spectroscopy measurement system is introduced and a 7.16μmquantum cascade laser(QCL)is used to measure the spectral parameters of methane(CH4)gas at different pressure(5～30 kPa)and temperature(290～1050K)ranges around this wavelength.The spectral parameters of the molecule themselves are measured not only in the pure methane environment,but also in the background gases of Ar,N2 and He with different relative molecular masses.The experimental results show that the relative magnitudes of the CH4 collisional broadening coefficients of the methane spectral lines measured in different environments are from large to small:self>N2>Ar>He.The measured pressure shift coefficients of the spectral lines measured in the four environments are all negative,and the pressure frequency shift of the spectral lines is negatively correlated with the pressure,and their absolute values are from large to small:self>N2>Ar>He,which are the same as the change of the collisional broadening coefficients.The respective uncertainties are calculated for all measured spectral parameters and the sources of the various uncertainties are quantified.