The invention discloses a virtual Internet-of-things gateway system capable of realizing multiprotocol and network self-adapting; and the gateway system uses a virtual Internet-of-things gateway to connect a sensor network with a traditional communication network and realize the protocol conversions of different types of sensor networks, equipment local interconnect and remote control. The invention is characterized in that the virtual Internet-of-things gateway contains a sensing access module in a sensing access layer, a protocol adaptation module and a network element service module which are in a protocol adaptation layer, a thing-connecting service control module in a control layer, and a heterogeneous network access module in a wide area access layer; the entire system adopts the virtual gateway method; the gateway equipment of the virtual Internet-of-things gateway system are arranged and only a plurality of physical interfaces are required to be added without greatly changing the internal circuit structure, thus the various demands of the future network can be satisfied and the development demand of the future Internet of things can be satisfied; and the incompatibility problem of the existing common gateway to the future Internet of things is effective solved, thus the gateway in the virtual gateway system has wide network applicability.