Method, device and system of terminal management

The invention discloses a method, a device and a system of terminal management, and relates to the technical field of the Internet. The method, the device and the system solve the problem that terminals with violation operation in a local area network cannot be effectively managed. The method comprises the steps of acquiring violation operation cases which are used for structurally describing preset violation operation, resolving the violation operation cases, obtaining a violation operation standard, monitoring terminal behaviors of terminals in the local area network, comparing whether the terminal behaviors are matched with the violation operation standard, and performing specific processing operation on the terminals corresponding to the terminal behaviors if the terminal behaviors are matched with the violation operation standard. The method, the device and the system are mainly used for monitoring and managing the terminal behaviors in the local area network.