Abstract: An equipment information security device is provided. The equipment information security device is installed on an equipment with confidential information, wherein the equipment or the device has a security interface, the device comprises: a fitting which is worn by a staff and combined with an electronic tag with or without authority to the corresponding equipment; a tag reader, which detects the electronic tag within a detecting area corresponding to the security interface; and an authority processing unit, which links to the tag reader: wherein the authority processing unit sets the security interface to an operation state and enables the security interface when there are only the authorized electronic tags being detected in the detecting area, and the authority processing unit sets the security interface to a security state and disables the security interface when one or more unauthorized electronic tags are detected in the detecting area.