To achieve precise measurement of high-power laser parameters, this paper proposes a multi-parameter cross-verification method based on laser energy, near-field gray values of the light beam, and integral values of the optical waveform. The self-consistency of the test results of energy, near-field distribution, and temporal waveform is verified through intra-shot data comparison and multi-shot verification. Experimental results show that under unchanged attenuation conditions, the relative deviations of the three-parameter test ratios are all less than 2%. When the laser energy approaches the lower limit of the linear range of the measurement equipment, the relative deviation can be controlled within 3%. This method effectively solves the problem that data deviations are difficult to recheck in traditional independent testing and provides technical support for the accurate measurement of high-power laser device parameters.