?With the rapid development of mobile communication technologies， complex and changeable environment as well as high-energy consumption will become major problem for the current and future mobile communication. Low-energy consumption， efficient communication environment adaptation will be one of the most important ways to develop mobile communication technologies. The development of reconfigurable intelligent surface （RIS） technology provides configurable services for mobile communication with low energy consumption and adaptive communication environment， and thus it can meet the service requirement for diversified devices in complex communication scenarios. Firstly， we summarize the RIS technique in terms of principles， features， advantages， etc. Then， the technical advantages of RIS are summarized according to the specific application scenarios. Finally， the potential technical challenges of RIS techniques are provided based on the existing work， and the research direction of RIS techniques is further discussed and explored. RIS technology will further facilitate the transformation of mobile communications technology and help mobile communication technology face future application requirements in complex and intelligent scenarios.