[Purpose/significance] In the era of big data,the "data island" of government flows in a new way,and the release of data is given high expectations. [Method/process] The thorough analysis of data can provide a path for realizing government innovation management mode,intelligent service system,system operation efficiency upgrading,but the realization of this path is facing great challenges,including how to use big data of government,and how to couple with the external data,which need further discussion. [Result/conclusion] The paper focuses on data convergence,integration,sharing,opening and application,and puts forward countermeasures and suggestions from the aspects of ideas,systems,technologies and security.