A charge-sharing control method for a display panel includes the following steps. Firstly, a first switch set is turned on, so that a first voltage driving unit provides a first positive driving voltage to a first data line and a second voltage driving unit provides a first negative driving voltage to a second data line. Then, a second switch set is turned on, so that a first charge storage unit has a positive common voltage and a second charge storage unit has a negative common voltage. Then, a third switch set is turned on, so that the first data line and the second data line are electrically connected with a ground voltage. After a polarity inversion, the second data line is charged according to a first comparison result and the first data line is discharged according to a second comparison result.