In 2008, trace concentration of water was identified in the Apollo volcanic glass, and water content in the core is higher than that in outer ring. On Nov. 2009, the Lunar Crater Observation and Sensing Satellite (LCROSS), which is launched alone with the Lunar Reconnaissance Orbiter (LRO), were sent to crash Cabeus crater to search for water ice. The data acquired by LCROSS show that water occurs on the Cabeus crater. On March, 2010, water was detected in apatite-bearing lunar rocks. And the same year, water ice was found to occur on the Moon by Mini-SAR aboard on Indian Chandrayan-1 orbiter. All these results and evidence have provided powerful supports for the existence of water on the Moon.