A high power pulsed laser mode measuring system using planar CCD camera is hereby introduced in this peper. The system includeS beam attenuator, single pulse selection and pulse synchronizing, beam matching, CCD Camera, frame grabber hard, monitor, computer and system software. The software is hased on intensity-Moments Analyses. It can give spatial energy distributions of high power, high repitition rate laser pulses, and simulate measurements. The M2 factor of laser ham quality is calculated from the data measured, and the laser beam quality can be valued.