A monitoring server includes a communication unit (11) that receives image data transmitted periodically from a robot (20), information on communication quality of a communication network between the monitoring server and the robot (20), and load information of the robot (20), and a distributed-processing control unit (12) that determines, based on at least one of tracking-operation-environment information of the tracking target (30) determined based on the image data, the information on the communication quality, and the load information, a process to be performed in the robot (20), and the process to be performed in the monitoring server itself from among an image analysis process including a plurality of processes, the image analysis process being a process of specifying the tracking target (30), in which the communication unit (11) transmits information on the process to be performed in the robot (20) to the robot (20).