To provide a servo control system capable of improving cooling efficiency by making the temperature in a control unit uniform.

The servo control system 1 includes driver units 62 to 66 each including an inverter unit for driving an AC motor by converting DC power into AC power, and a control unit 600 for controlling the driver units 62 to 66, wherein the control unit 600 includes a housing with a sealed structure, an electronic component provided in the housing, and a fan provided in the housing to stir the air in the housing. An air flow is generated in the housing having the sealed structure by the fan in the housing of the control unit 600 to stir the air in the housing. Consequently, a temperature gradient in the housing is eliminated to improve the cooling efficiency in the housing. Therefore, the electronic component is prevented from abnormal operation due to high temperature.