Disclosed is a method of measuring a video call quality of a mobile terminal, the method including establishing a video call between a transmitting terminal and a receiving terminal; modifying a video capture function provided from a terminal operating system (OS) and inserting a sequentially increasing index and timestamp into each video frame that is automatically acquired through a camera every time a video call application (app) of the transmitting terminal calls the video capture function; transmitting, by the transmitting terminal, the video frame to the receiving terminal; storing, by the receiving terminal, the video frame at a ratio higher than a frame per second (FPS) of the transmitting terminal; and extracting the index and the timestamp from the stored video frame through an optical character reader (OCR) text recognition and calculating a quality index.