A video terminal device includes a capture module, a detection module, a transmitting module, and a displaying module. The capture module takes images of the eyes of a user when the user is gazing at a display device to obtain three points of focus of the eyes, and confirms a circle bounding the three points of focus. The detection module detects whether an area of the applied circle is less than a first threshold. The transmitting module outputs coordinates of the center of the applied circle as an eyes direction when the area of the circle is less than the first threshold, enabling the participants in a conference to see the eyes direction of the presenter and the presenter to see the eyes directions of each of his audience.