The invention discloses a group identification (GID) system with a global ubiquitous communication function. The GID system comprises a mobile terminal, a GID bridging functional module, a wireless communication network and a cloud service platform. The invention further discloses a terminal identity unique credible recognition method of the GID system. The method includes: firstly, a global function of the GID system, namely the globalized communication function, is achieved based on network ubiquitousness, communication bridging, global positioning, network compatibility, net surfing and the like; and secondly, a polymer-network gene identity (ID) based on user objective element information is built by intelligently sensing various user objective attribute information, namely client parameters, dynamic parameters, static parameters, terminal side parameters, network side parameters and service side parameters, so that intelligent, unified and credible identity recognition of the GID system is achieved.