The invention relates to a visual sensor abnormality cause estimation system for estimating the causes of abnormalities in a camera in a production system in which the camera controls a robot. The production system includes a robot, a camera that detects visual information of the robot or the surrounding thereof, and a controller that controls the robot based on an image signal obtained by the camera. The camera abnormality cause estimation system estimates the causes of abnormalities in the camera and includes an environment information acquisition unit that acquires environment information of the camera, and an abnormality cause estimation unit (37) that estimates a probability that each of a plurality of predetermined abnormality cause items is the cause of an abnormality in the camerafor the respective abnormality cause items using the environment information acquired by the environment information acquisition means and displays the estimated probability on a display unit for therespective abnormality cause items.