UWB (ultra wideband) is the most advanced wireless communication technology working over 1 GHz bandwidth. With this technology, the system or equipment can carry data on the speed over 100 Mbit/s. UWB have much excellent performances, including high speed data, low power, high location accuracy. So, It is likely to be used in such area, WPAN (wide personal access network), intelligent traffic system, exploration and imaging system. More and more corporations pay more attention on this technology. The article introduces the understandings of this technology and summarizes the standard and industry development status of UWB.