A transmission device based on an isomerous data stream comprises an audio input interface, a video input interface, a serial interface and a device control signal input interface. The interfaces preprocess collected signal data and transmit the pre-processed signal data to a signal classifying processing unit and an embedded type microprocessor of a control circuit, the states of special medical devices connected into a system can be intelligently monitored and controlled through a WEB container unit and a device managing unit in the control circuit, information has access to the Internet through a network interface in a unification mode, and Internet transmission of device information is achieved. A uniform special medical device access mode is provided for the medical intelligent information system, the various special medical devices can be intelligently managed conveniently, the management procedures of the devices are simplified, the problems of dispersing and managing inconvenience caused when the special medical devices are connected to the medical intelligent information system are solved, and further deployment and implementation of the medical intelligent information system are facilitated.