A controller for an imaging terminal having an imaging device and a first displaying device includes a processor and a memory. The memory stores instructions, when executed by the processor, causing the processor to perform: acquiring shot image data, the shot image data being obtained by shooting a second displaying device which is a part of an apparatus, the apparatus being a target device to be shot, the second displaying device being configured to display a specific state image indicative of a current state of the apparatus; acquiring, by analyzing the shot image data, specific identification information for identifying specific relevant information associated with the specific state image; acquiring the specific relevant information by using the specific identification information; and controlling the first displaying device to display the specific relevant information.