The invention provides an overdriving circuit system of a display panel. The overdriving circuit system includes a detecting circuit, a timing controller and a storage device. The detecting circuit is for detecting a temperature of the display panel to generate a corresponding voltage. The storage device is for storing multiple overdriving tables. The timing controller is for selecting the overdriving table corresponding to the voltage from the overdriving tables as per the voltage. The overdriving circuit system takes the influence of temperature in consideration, detects the temperature of the display panel and uses corresponding overdriving tables at different temperatures, and therefore can avoid the occurrence of smear phenomenon.