308 laser equipment is the only high technology laser equipment that was invented by scientists from chinese academy of science. It has many advantages such as high efficiency, high recovery rate, no side effect, no blind angle treatment and high security. It is much more accurate and targeting for high-quality treatment. The intensity of radiation is 1000 times than common violet light, greatly increased patient¡¡£¤s tolerance. 308nm excimer uv-light is single-rate excimer light by using xeci as illumination, to induce t cells apoptosis and improve pigment synthesis, which proved to be effective for many skin diseases with accurate treatments.