Facility imaging device and method reduces a load of traffic on a network when collecting images that result from image-capturing the insides. The facility imaging device including a capture that image-captures the inside of a facility and sequentially outputs captured images that temporally follow one another; a processor that performs image processing on the captured images and outputs processed images; and a communicator that transmits the processed images to an image recording server through the network. Whenever the captured image is input from the capture, the processor updates dominant image information and generates a reading still image that results from removing a moving object, as a processed image. The communicator transmits the reading still image at a prescribed timing. Furthermore, a reading screen is delivered from a facility operation support device to a user terminal device and thus the reading screen is displayed on the user terminal device.