An airflow direction controlling apparatus includes a frame arranged near an outlet of a fan, at least one blade pivotably mounted to the frame and driven by a motor, at least two thermal sensors for detecting temperatures of at least two electronic components in a computer, and a control module electronically connected to the at least two sensors and the motor. The control module receives the detected temperatures from the sensors, determines if an electronic component is in danger of overheating, and controls the motor to rotate the at least one blade to a desired position where airflow of the fan blows toward the electronic component in danger of overheating, to quickly dissipate the heat generated by the electronic component.