Abstract: A cooling system cools an automated driving controller that executes processing related to automated driving control of a vehicle. The cooling system includes the automated driving controller and a housing. The automated driving controller includes a preprocessing circuit module to preprocess sensor data obtained by sensing an external environment of the vehicle, and a recognition circuit module to execute recognition processing of the external environment based on the preprocessed sensor data. The housing accommodates the preprocessing circuit module and the recognition circuit module together with an insulating liquid. The preprocessing circuit module is to be air-cooled by placement outside the insulating liquid. The recognition circuit module is to be cooled by immersion in the insulating liquid.