The invention discloses a roller level measuring method of the roll system space position, which is characterized by the following: the roll system contains the first central line point and roller between two central line points; the method comprises the following steps: erecting the full-station device between two central line points; fixing one target rod on the measured roller; measuring the coordinate of the first and second central line point by full-station device as the original point position of full-station device; rotating the measured roller; regarding the coordinate original point as the position of full-station device when measuring three different rotating positions of measured roller; transmitting the measuring point coordinate of three rotary locations into the first or second central line point as the original point; adapting the connecting line of the first and second central line point as coordinate value of axle X coordinate system; gaining the level A of measured roller through a series of formula. |