A remote energy control system for shengguang-II high power laser is designed, including a half-wave plate-polarizer combination attenuation device and a closed-loop negatinve feedback control method. For the optical adjustment programs, a half-wave plate-polarizer combination attenuation device is designed to control the laser energy. For the control algorithm, a closed-loop proportion integral derivative control adjustment of energy is realized. For the adjustment precision, it achieves a regulation accuracy of 1% and the ralative error is lower to 0.1%. The remote energy control system of high power pulsed laser in this article uses the communication of eneryg meter, stepper motor and computer software to achieve the closed-loop proportion intergral derivative control of the laser energy. It has the feature of widdly range of applications, easy adjustment, high control accuracy and good expansibility.