The invention relates to an evolution-data optimized (EVDO)-based onboard information system, which comprises an audio and video acquisition module, a global positioning system (GPS) module, an automobile data recorder, an alarming module, a video superimposing device, a video compression module, a video storage module, an EVDO communication module, an EVDO communication network and a server, wherein the video superimposing device is connected with the audio and video acquisition module, the GPS module, the automobile data recorder and the alarming module respectively; the video superimposing device, the video compression module and the video storage module are connected; the video storage module is connected with the EVDO communication module; and the EVDO communication module is connected with the server through the EVDO communication network. Compared with the prior art, the system has the advantages of multifunction, low cost and the like.