An state determination system comprises an information acquiring portion that acquires an environment information, a movable body, an instruction portion that performs an action instruction to the movable body, and an estimation portion that estimates an abnormality of the object based on at least one of the information acquired by the information acquiring portion and the environment information acquired by the movable body. In case the estimation portion estimates the abnormality of the object, the instruction portion performs the action instruction for moving to the neighborhood of the object and requiring a response, to the movable body. At least one of the information acquiring portion and the movable body acquires the response state of the object to the action of the movable body instructed by the instruction portion. The state determination system comprises a determination portion that the abnormality of the object based on the acquired response state.