Confidential projection system and confidential projection method

The invention provides a confidential projection system and a confidential projection method. The system comprises a projection system, a secrecy system and a master control system which work cooperatively, and on one hand, the master control system controls the projection system to receive image data displayed by terminal equipment and projects the image data to a shared screen; on the other hand, the control secrecy system responds to the secrecy demand instruction to start at least one of an anti-recording device, an anti-disassembly self-destruction device and a wireless signal shielding device; the anti-recording device is used for outputting disordered ultrasonic signals, the anti-disassembly self-destruction device is used for applying breakdown voltage to a host and a memory of the projection system, and the wireless signal shielding device is used for transmitting electromagnetic waves in a mobile communication working frequency band. According to the invention, aiming at interference of stealing and