Before the various types of national information systems involved in government affairs are networked, it is impossible to talk about the collection and use of big data. At present, part of the department's data to realize the national network, part of the realization of the regional network, there are many not formed data system. The big data collection and networking of various sectors are delayed because of various artificial, sectoral and regional protection reasons. The simplest example is the tax information, banking information has not been networked.