A high energy and high beam quality laser diode pumped all-solid-state laser is reported. Master oscillator and power amplifier construction is used. The 1338 nm and 1064 nm oscillations are suppressed by coating reflector and inserting 45° mirror to increase losses. A temperature-controlled Fabry-Porro etalon is inserted in resonant cavity to realizing linewidth narrowing and wavelength selecting. In order to achieve high output energy, the laser is amplified twice in pre-amplifier and main amplifier. Drive source signal is delayed to make injected laser pulse of main amplifier and drive source pulse time-synchronization better. When pumping current of the main amplifier is 140 A, the laser output energy is 800 mJ, the beam quality foctor M2 is 1.49, and the linewidth is 1.05 GHz. The repetition frequency is 50 Hz with the pulse width of about 200 μs.