Abstract: In this paper,the development of XGⅡ high power solid-state laser facility and the physical experimental research are briefly introduced.A system with two-probe laser beams has been developed based on XGⅡ high power solid-state laser facility which is used for laser plasma diagnostic experiments.The design optimization method of energy system and new research progress of concentrate control system of the laser facility has also been explained here,and the methods and results obtained in this paper are applicable to the design of high power solid-state laser system.