Quantum information technology is an interdisciplinary development that combines quantum physics and information technology, mainly including quantum communication and quantum computing. Quantum communication can realize the secure transmission of information. Quantum computing can be used to solve some traditional classic computers. The problem of quantum information, represented by quantum computing, quantum communication and quantum measurement, has become one of the important fields of national scientific and technological development in the future, and the world's scientific and technological powers attach great importance to it. Quantum information technology is recognized as one of the core technologies most likely to subvert the existing computing, measurement, communication and other technical fields.