The applications for high-power ultraviolet (UV) lasers are introduced.The principle for the generation of ultraviolet lasers and the performances of nonlinear optical crystals used for high-power ultraviolet lasers are reviewed.The research progress on the high-power all-solid-state 355 nm and 266 nm ultraviolet lasers at home and broad are given.The problems and probable techniques for the development of the high-power all-solid-state ultraviolet lasers are previewed.