The invention discloses a device and method for processing subway train fault intelligent. The device comprises a vehicle-mounted system, a wireless AP (access point), an external network server, a fire wall, an internal network server and a terminal computer, wherein the vehicle-mounted system acquires the running state and fault data of a subway train, data is transmitted by virtue of the wireless AP and the external network server, the vehicle-mounted system transmits the state and the fault data to the internal network server by virtue of the wireless AP, the fire wall is arranged between the internal network server and the external network server and is used for secure transmission of the data, the external network transmits the state and the fault data into the internal network server, the internal network server is connected with the terminal computer, the internal network server analyzes the acquired state and fault data into a corresponding database table field to generate fault information, and a user accesses the internal network server to check the fault information in real time on the terminal computer. By applying the technical scheme in the invention, the user and a driver can check the fault information in real time, corresponding processing is carried out, and operation security of the subway train is improved.