The invention discloses a method, device and system used for tamper-proofing privilege management. The method used for tamper-proofing privilege management comprises that a business updating module sends a business updating notification to a privilege management module when receiving a business updating trigger message; the privilege management module instructs a tamper-proofing module to open tamper-proofing privilege management when receiving the business updating notification; after the tamper-proofing module opens the tamper-proofing privilege management, the business updating module carries out the business updating process. According to the invention, the tamper-proofing privilege management function and the business process are combined, the problems that the existing tamper-proofing technology and the business are weakly correlated with each other can be effectively solved, the tamper-proofing privilege and the updating process are reasonably combined, and furthermore a higher-security-level tamper-proofing requirement can be achieved.