A map information system comprising: a map database (MAP_DB) including a plurality of types of map information used for driving assist control for assisting driving of a vehicle; and a driving assist level determination device configured to determine an allowable level of the driving assist control that is allowed when the vehicle travels in a target range, wherein: the map information is associated with an evaluation value indicating a certainty of the map information for each location in an absolute coordinate system, characterized in that: the driving assist level determination device is configured to acquire, based on driving environment information indicating a driving environment of the vehicle, intervention operation information indicating an intervention operation location that is a location where an intervention operation is performed, the intervention operation being an operation performed by a driver of the vehicle to intervene in the driving assist control during execution of the driving assist control, the driving environment information including information indicating that the intervention operation has been performed, acquire, based on the map information, a plurality of evaluation values for each point or section within the target range for the respective types of map information; and determine, based on the evaluation values and the intervention operation location, a plurality of allowable levels for each point or section within the target range and combine the determined allowable levels to determine a final allowable level. a map database (MAP_DB) including a plurality of types of map information used for driving assist control for assisting driving of a vehicle; and a driving assist level determination device configured to determine an allowable level of the driving assist control that is allowed when the vehicle travels in a target range, wherein: the map information is associated with an evaluation value indicating a certainty of the map information for each location in an absolute coordinate system, characterized in that: the driving assist level determination device is configured to acquire, based on driving environment information indicating a driving environment of the vehicle, intervention operation information indicating an intervention operation location that is a location where an intervention operation is performed, the intervention operation being an operation performed by a driver of the vehicle to intervene in the driving assist control during execution of the driving assist control, the driving environment information including information indicating that the intervention operation has been performed, acquire, based on the map information, a plurality of evaluation values for each point or section within the target range for the respective types of map information; and determine, based on the evaluation values and the intervention operation location, a plurality of allowable levels for each point or section within the target range and combine the determined allowable levels to determine a final allowable level. acquire, based on driving environment information indicating a driving environment of the vehicle, intervention operation information indicating an intervention operation location that is a location where an intervention operation is performed, the intervention operation being an operation performed by a driver of the vehicle to intervene in the driving assist control during execution of the driving assist control, the driving environment information including information indicating that the intervention operation has been performed, acquire, based on the map information, a plurality of evaluation values for each point or section within the target range for the respective types of map information; and determine, based on the evaluation values and the intervention operation location, a plurality of allowable levels for each point or section within the target range and combine the determined allowable levels to determine a final allowable level.