An interpupillary distance measuring method, comprising: adopting a first camera and a second camera to respectively capture a left-eye image including a left eye and a right-eye image including a right eye; and performing the following steps by a processor: extracting two pupil image positions corresponding to pupils of two eyes from two eye images each of which includes one eye, which includes: determining the pupil image position of the left-eye pupil in the left-eye image and the pupil image position of the right-eye pupil in the right-eye image; and determining an actual distance between the pupils of two eyes according to the two pupil image positions, characterized in that: determining the actual distance between the pupils of two eyes according to the two pupil image positions includes: determining an image position of the first camera in the left-eye image and an image position of the second camera in the right-eye image, the image position of the first camera in the left-eye image being an image center of the left-eye image, the image position of the second camera in the right-eye image being an image center of the right-eye image; determining a first horizontal image distance between the pupil image position of the left-eye pupil and the image position of the first camera in the left-eye image; determining a first horizontal actual distance between the left-eye pupil and the first camera according to the first horizontal image distance; determining a second horizontal image distance between the pupil image position of the right-eye pupil and the image position of the second camera in the right-eye image; determining a second horizontal actual distance between the right-eye pupil and the second camera according to the second horizontal image distance; and determining the actual distance between the pupils of two eyes according to the first horizontal actual distance and the second horizontal actual distance. extracting two pupil image positions corresponding to pupils of two eyes from two eye images each of which includes one eye, which includes: determining the pupil image position of the left-eye pupil in the left-eye image and the pupil image position of the right-eye pupil in the right-eye image; and determining an actual distance between the pupils of two eyes according to the two pupil image positions, characterized in that: determining the actual distance between the pupils of two eyes according to the two pupil image positions includes: determining an image position of the first camera in the left-eye image and an image position of the second camera in the right-eye image, the image position of the first camera in the left-eye image being an image center of the left-eye image, the image position of the second camera in the right-eye image being an image center of the right-eye image; determining a first horizontal image distance between the pupil image position of the left-eye pupil and the image position of the first camera in the left-eye image; determining a first horizontal actual distance between the left-eye pupil and the first camera according to the first horizontal image distance; determining a second horizontal image distance between the pupil image position of the right-eye pupil and the image position of the second camera in the right-eye image; determining a second horizontal actual distance between the right-eye pupil and the second camera according to the second horizontal image distance; and determining the actual distance between the pupils of two eyes according to the first horizontal actual distance and the second horizontal actual distance. determining an image position of the first camera in the left-eye image and an image position of the second camera in the right-eye image, the image position of the first camera in the left-eye image being an image center of the left-eye image, the image position of the second camera in the right-eye image being an image center of the right-eye image; determining a first horizontal image distance between the pupil image position of the left-eye pupil and the image position of the first camera in the left-eye image; determining a first horizontal actual distance between the left-eye pupil and the first camera according to the first horizontal image distance; determining a second horizontal image distance between the pupil image position of the right-eye pupil and the image position of the second camera in the right-eye image; determining a second horizontal actual distance between the right-eye pupil and the second camera according to the second horizontal image distance; and determining the actual distance between the pupils of two eyes according to the first horizontal actual distance and the second horizontal actual distance.