The invention discloses a multifunctional computer key, which is characterized by comprising a computer key master device and a multifunctional photo and video slave device, wherein the computer key master device is connected with the multifunctional photo and video slave device through a pluggable piece; the computer key master device comprises a master device microprocessor, a power module, a master device USB (Universal Serial Bus) data interface, a temperature and humidity sensor, and a master device human-computer interaction module; the multifunctional photo and video slave device comprises a slave device microprocessor, a slave device USB data interface, a storage module, a recording module, a playback module, a camera and a slave device human-computer interaction module. According to the multifunctional computer key provided by the invention, video recording, photo shooting and sound recording functions can be realized through the multifunctional photo and video slave device, and after the device starts up, the multifunctional photo and video slave device automatically enters a real-time video recording and synchronous sound recording mode without the need for manual intervention, so that the convenience in operation on-spot record and transmission is realized, the accuracy of reported defects is effectively improved, the labor intensity and the work load of operation personnel are reduced, and the work efficiency is improved.