A livestock house monitoring method includes: capturing a moving image of an inside of a poultry house; converting a plurality of images included in the moving image captured into black-and-white images; and generating an image for monitoring purposes showing a distribution of chickens inside the poultry house by performing statistical processing on the plurality of images converted into the black-and-white images. The poultry house is an example of a livestock house, and chickens are an example of livestock.