An image collection system includes: a captured-image analysis unit that determines whether a captured image, captured by a camera mounted on a mobile object, of surroundings of the mobile object is a first captured image including an image portion of a specified monitoring target object; an image-capturing-condition recognition unit that recognizes a first image-capturing condition that is an image-capturing condition at the time when the camera captures the first captured image; and a monitoring-target-object-information providing unit that transmits monitoring-target-object image information in which the first captured image and the first image-capturing condition are associated with each other, to a specified provision destination.