An organic light-emitting diode circuit and a driving method thereof are disclosed herein. The organic light-emitting diode circuit includes a storage unit, a transistor, a coupling capacitor, a compensation unit, an input unit, a switch unit, and an organic light-emitting diode. The transistor is configured to be driven by a voltage stored in the storage unit so that a second end of the transistor generates a driving current. The coupling capacitor changes a voltage of the second end of the transistor. The compensation unit changes the voltage level at the second end of the transistor according to a first scan signal. The input unit transmits a data voltage to the storage unit according to a second scan signal. The switch unit is turned on according to a light-emitting signal so that the driving current is transmitted to the organic light-emitting diode through the switch unit.