The present invention discloses a method to automatically arrange word string in a display. The word string includes two words. The method includes the following steps. The first step is to define the positions of the start position and the stop position of strokes of the two words. The second step is to group the start position and the stop position based on a threshold value. The third step is to circle the words based on the grouping result. The final step is to rearrange the two words based on a datum point.