A driving assistance system characterized by comprising: a storage unit at a center, configured to store operation results of first assistance apparatuses from provider vehicles as a plurality of first movable bodies (20A-20D) which are configured to provide information regarding driving assistance to the center; a determination unit configured to determine whether or not an operation result of a second assistance apparatus configured to perform second driving assistance that differs from the first driving assistance on a user vehicle as a second movable body is related to the operation result of the first assistance apparatus; an information providing unit (133, 134) configured to provide assistance information based on an operation result of the first assistance apparatus when the determination unit determines that the operation result of the second assistance apparatus is related to the operation result of the first assistance apparatus; and an assistance unit configured to acquire assistance information provided by the information providing unit (133, 134) and to perform driving assistance on the second movable body based on the assistance information, wherein: each first movable body (20A-20D) is a vehicle including the first assistance apparatus and the second assistance apparatus; the second movable body is a vehicle including the second assistance apparatus; the first assistance apparatus is an apparatus configured to prevent a vehicle from skidding to stabilize the vehicle, and the second assistance apparatus is an apparatus configured to prevent wheels from locking during braking; and the determination unit is configured to determine whether or not the operation result of the second assistance apparatus is related to the operation result of the first assistance apparatus based on the number of operations of the second assistance apparatus of the second movable body. a storage unit at a center, configured to store operation results of first assistance apparatuses from provider vehicles as a plurality of first movable bodies (20A-20D) which are configured to provide information regarding driving assistance to the center; a determination unit configured to determine whether or not an operation result of a second assistance apparatus configured to perform second driving assistance that differs from the first driving assistance on a user vehicle as a second movable body is related to the operation result of the first assistance apparatus; an information providing unit (133, 134) configured to provide assistance information based on an operation result of the first assistance apparatus when the determination unit determines that the operation result of the second assistance apparatus is related to the operation result of the first assistance apparatus; and an assistance unit configured to acquire assistance information provided by the information providing unit (133, 134) and to perform driving assistance on the second movable body based on the assistance information, wherein: each first movable body (20A-20D) is a vehicle including the first assistance apparatus and the second assistance apparatus; the second movable body is a vehicle including the second assistance apparatus; the first assistance apparatus is an apparatus configured to prevent a vehicle from skidding to stabilize the vehicle, and the second assistance apparatus is an apparatus configured to prevent wheels from locking during braking; and the determination unit is configured to determine whether or not the operation result of the second assistance apparatus is related to the operation result of the first assistance apparatus based on the number of operations of the second assistance apparatus of the second movable body. each first movable body (20A-20D) is a vehicle including the first assistance apparatus and the second assistance apparatus; the second movable body is a vehicle including the second assistance apparatus; the first assistance apparatus is an apparatus configured to prevent a vehicle from skidding to stabilize the vehicle, and the second assistance apparatus is an apparatus configured to prevent wheels from locking during braking; and the determination unit is configured to determine whether or not the operation result of the second assistance apparatus is related to the operation result of the first assistance apparatus based on the number of operations of the second assistance apparatus of the second movable body.