Image photographing device used for vehicle monitoring and monitoring method thereof

The invention belongs to the technical field of vehicle monitoring, and provides an image photographing device used for vehicle monitoring and a monitoring method thereof. The image photographing device comprises a control module, a first camera, a second camera and a data processing and transmission module. When the control module detects that the first camera identifies the license plate of a first vehicle, the first camera is controlled to start recording the video data of the first vehicle. When the control module detects that the first camera identifies the license plate of a second vehicle, the first camera is controlled to record the video data of the second vehicle and the second camera is controlled to record the video data of the first vehicle. The first camera and the second camera transmit the recorded video data to the data processing and transmission module. The data processing and transmission module splices the video data of the first vehicle into the complete video data and performs data tran