To provide a pet management system, a pet management method, a pet management device,and a pet management program capable of easily grasping a health state of a pet.SOLUTION: A pet management system comprises: a water feeding tray 2 comprising a water drinking amount acquisition part 21 for acquiring a water drinking amount of a pet and generating water drinking amount information indicating the water drinking amount; a pet toilet 1 comprising an urination volume acquisition part 11 for acquiring an urination amount of the pet and generating urination volume information indicating the urination volume; a health state determination part 41 for determining the health state of the pet on the basis of the water drinking amount information and the urination volume information, and generating health state information indicating health state of the pet; and a display control part 52 for receiving the health state information, and displaying the health state of the pet.SELECTED DRAWING: Figure 1
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