7 types of volume absorption laser energy meters for accurately measuring the output multi-wavelength high power energy from SG-Π are developed. The technical parameters including sensitivity, homogeneity and stability etc, are better than the original designing objectives via the calibration and testing by Chinese Metrology Academy. These devices satisfy requirements of multi wavelength high power laser energy measurement for SG-Π. The sampling modes and measuring accuracy of the laser energy measurement at 3 kinds of wavelengths at SG-Π facility are also analyzed in this paper.