Abstract: A fetal head direction measuring device includes a medical ultrasonic probe for scanning and acquiring a preset ultrasonic image, an angle sensor fixed to the medical ultrasonic probe for sensing an angular change of a scanning direction of the medical ultrasonic probe, and a data processing unit for calculating a fetal head direction. A fetal head direction measuring method includes: obtaining an angle value sensed by the angle sensor at an initial position; acquiring a preset ultrasonic image and recording an angle value sensed by an angle sensor at this time; marking preset fetal head feature points and calculating a directional angle of the preset fetal head feature points in the preset ultrasonic image; and determining the fetal head direction. A fetal head orientation can be measured and calculated more conveniently and flexibly, and the user operation is simpler and more flexible.