A laser far-field energy density distribution measurement system based on CCD imaging is designed, the measurement principles based CCD imaging method is given, and the model of laser energy measurement is simplified under special conditions. The image information of laser energy density reflected by the reflective board is acquired by the CCD camera, and the laser energy data is received by detectors on the reflective board. The laser spot image and the actual energy data gotten by energy detectors are analyzed according to the model of laser energy measurement, the relationship between gray value and energy density is gotten, and then the energy density distribution can be calculated. Experiments show that this system can measure the energy density distribution with less measurement error. The system is simple, reliable, and suitable for far-field energy density distribution measurement under various conditions.