Streaming media rearview mirror and visual field adjusting method thereof

The embodiment of the invention provides a streaming media rearview mirror and a visual field adjusting method thereof. The rearview mirror comprises a display screen, a video acquisition module, a display visual field adjusting module, and a display content extraction module, wherein the video acquisition module is used for acquiring video images in a preset visual field range behind a motor vehicle in real time, and the preset visual field range is larger than a visual field area range displayed by a display screen in a full-screen mode; the display visual field adjusting module is used forman-machine interaction to input and determine adjusting parameters of a to-be-displayed visual field area range needing to be displayed in the display screen; and the display content extraction module is used for extracting a to-be-displayed content contained in the to-be-displayed visual field area range from the video image according to the adjustment parameters and sending the to-be-displayedcontent to the display scr