A vehicle monitoring system that captures and displays the outside of an open door, which is a vehicle door opening upon stopping of a train including a plurality of vehicles in which vehicle doors are provided on both sides of each vehicle, i.e. an A side on the right in travelling direction of the train and a B side on the left in the travelling direction of the train, the vehicle monitoring system comprising: a plurality of cameras provided respectively corresponding to a plurality of vehicle doors to capture the outside of each corresponding door; a management device that determines the camera corresponding to the open door; and a display device that displays image data captured by the camera corresponding to the open door based on the determination of the management device, wherein the management device includes a control unit and a storage unit, wherein the storage unit associates and stores the identifier of each of the plurality of cameras, and an initial position indicating on which side, A side or B side, each of the plurality of cameras is located in an initial configuration of the train before a possible change in the travelling direction of a vehicle of the train, and wherein, after obtaining door opening-side information indicating that the vehicle doors on the B side (3, 3, 3, 3, 3, 3, 3, 3) will open when the train stops as well as open door identification information based on the determination of an ON/OFF state of a vehicle side lamp made by analysing the image received from a camera, and identifying an open door of a vehicle, the control unit determines, with respect to a matching vehicle in which the initial position of a door-open camera, which is the camera corresponding to the open door identified by the open door identification information, and the door opening-side information match with the B side, each camera (2, 2, 2, 2), the initial position of which is on the B side, as a display use camera, which is the camera to be used for display in the display device, while with respect to a non-matching vehicle in which the initial position of the door-open camera and the door opening-side information do not match with the B side, the control unit determines each camera (2, 2, 2, 2), the initial position of which is on the A side, as the display use camera. a plurality of cameras provided respectively corresponding to a plurality of vehicle doors to capture the outside of each corresponding door; a management device that determines the camera corresponding to the open door; and a display device that displays image data captured by the camera corresponding to the open door based on the determination of the management device, wherein the management device includes a control unit and a storage unit, wherein the storage unit associates and stores the identifier of each of the plurality of cameras, and an initial position indicating on which side, A side or B side, each of the plurality of cameras is located in an initial configuration of the train before a possible change in the travelling direction of a vehicle of the train, and wherein, after obtaining door opening-side information indicating that the vehicle doors on the B side (3, 3, 3, 3, 3, 3, 3, 3) will open when the train stops as well as open door identification information based on the determination of an ON/OFF state of a vehicle side lamp made by analysing the image received from a camera, and identifying an open door of a vehicle, the control unit determines, with respect to a matching vehicle in which the initial position of a door-open camera, which is the camera corresponding to the open door identified by the open door identification information, and the door opening-side information match with the B side, each camera (2, 2, 2, 2), the initial position of which is on the B side, as a display use camera, which is the camera to be used for display in the display device, while with respect to a non-matching vehicle in which the initial position of the door-open camera and the door opening-side information do not match with the B side, the control unit determines each camera (2, 2, 2, 2), the initial position of which is on the A side, as the display use camera.