A display device of built-in sensitive device comprises a display screen. The present invention is characterized in that the display device also comprises a light sensitive device and a monitoring device; the light sensitive device comprises a plurality of light sensors; the light sensors sense the change of incident rays and generate light sensitive signals; the electric signals of all light sensors are monitored by the monitoring device; when the light sensitive signal generated by a certain light sensor is monitored, the position coordinate information of the light sensor, stored in the monitoring device, is extracted, and the position coordinate information of the light sensor is fed back to the external. The variation of the light environment in a certain position on the surface of the display screen can be sensed when the display device is operated. The position information is input, so the purpose of information input is realized. The display device is optimally operated by illuminating operating light beams generated by a light beam generator to the specific position of the display surface of the display screen. The display device integrates the functions of remote controland dot control. A built-in sensitive device is optimally adopted. The light sensors share the film structure necessary for thin film transistors.