The invention discloses a method for drawing an image ruler. The method comprises the following steps: pre-analyzing the requirements of ruler drawing in various ultrasonic modes, distinguishing the same points and different points, and separating the same points and the different points; starting a ruler drawing function to obtain corresponding image parameter data information of each different point; converting the image parameter data information into corresponding ruler drawing parameter data; drawing a ruler according to the obtained ruler drawing parameter data. The invention further discloses corresponding equipment. In the method, the same points and the different points of the ruler drawing in different imaging modes are separated, and processing is performed specific to different points, so that the ruler drawing is simplified, the multiplex ratio and maintainability of codes are improved, and the problems of software instability, increase in the drawing error rate, code redundancy and the like are solved.