An information processing system includes a memory to store information of a target objective set for a mobile apparatus, and circuitry. The circuitry acquires external information of the mobile apparatus, acquires internal information of the mobile apparatus, generates an autonomous traveling route of the mobile apparatus based on the external information, the internal information, and the information of the target objective, converts the autonomous traveling route of the mobile apparatus to image information based on at least one of the external information and the internal information, and outputs the image information indicating the autonomous traveling route of the mobile apparatus.