A height measurement method is provided. The method includes: detecting, at a sensor of an electronic device, a distance between the electronic device and an object to be measured; emitting, from two apertures of the sensor, two beams of light, wherein one of the beams is directed at a first end of the object to form a first light spot at the first end of the object and the other one of the beams is directed at a second end of the object to form a second light spot at the second end of the object; obtaining, at the electronic device, a first angle between one of the beams and a horizontal line and a second angle between the other one of the beams and the horizontal line; and calculating, at the electronic device, a height of the object based on the first and second angles and the distance.