A stabilizer system is provided with a stabilizer bar configured to connect a left wheel and a right wheel of a vehicle to each other and suppress a roll of the vehicle by torsional reaction force, an actuator configured to control a relative torsional amount between a side of the left wheel and a side of the right wheel of the stabilizer bar, and a control device configured to control the actuator. The actuator can selectively operate in a permitting mode in which increase and decrease in the torsional amount is permitted or in a regulating mode in which the increase and decrease in the torsional amount is regulated.