To meet the requirements of continuous laser power measurement,a specialized energy collection system for continuous spectrum lasers is desighed, which is capable of high-precision detection of energy distribution in the wavelength range from 0.4μm to 2.4μm, with multiple output channels and extremely high repetition frequency. The system uses a thermopile detector with copper oxide as the absorption layer, combined with signal processing techniques, and implements dynamic response and precise resolution of wide-spectrum laser energy using a weighted sliding mean filter algorithm. Through energy calibration for the 671 nm and 1064 nm bands, the system can provide stable measurement results under complex spectral conditions. Experimental results show that the measurement error between the system developed using this approach and the standard laser power meter is within ±1.5%. This result demonstrates the feasibility of measuring a continuum laser energy system.