According to ISO 13660, Line quality was analyzed and evaluated by using a digital printing quality measurement system based on a scanner. The test sheets were printed by two xerographic digital presses, one of which used liquid toner and the other used solid toner, on two types of paper respectively. The line quality of two digital presses was analyzed and evaluated in line width, raggedness, and blurriness, which are line and character attributes defined in ISO 13660. The measurement results showed that the line quality is different due to the difference of imaging system, structure design and toner used in the two digital presses.