A laser power/energy meter which is designed based on laser induced thermoelectric voltage (LITV) effect was reported. The laser power/energy meter can not only measure and record the energy of every input laser pulse and the total real-time energy, but also can record the response waveform of every input laser pulse. It realize the real-time controlling for laser energy. It was used to simulating experiment for 248 nm excimer laser. The result show that the relative standard deviation (RSD) of the laser output energy is 8.6%～10.7% with repetition frequency. And under the simulating setup parameters of refractive surgery, 193 nm excimer laser was measured, and its RSD is 8.3%. This kind of laser power/energy meter would be very significant in cornea refraction operation.