A cursor control system including a plurality of electronic devices is provided. Each of the electronic devices includes a display screen to display a data frame and a cursor. The cursor control system includes a first electronic device, a second electronic device, a mouse and a displacement detection unit. The mouse controls a movement and a direction of the cursor on the first electronic device or the second electronic device. The data frame is dragged to another position or into another data frame on the display screen when the data frame is clicked by the mouse. The displacement detection unit detects whether the cursor moves to a boundary of the first electronic device or a boundary of the second electronic device. The displacement detection unit detects whether the data frame moves to the boundary of the first electronic device or the boundary of the second electronic device.