Abstract: A method and device for displaying a window of security class software are disclosed. The method includes processing a window based on a selected window style according to a detection result of a security status of a processing equipment detected by the security class software, and displaying the window corresponding to the detection result. Based on characteristics of the security class software, a solution that can display different windows under one window style according to the detection result of the processing equipment is provided, so that a user can intuitively know the current security status of the processing equipment through an intelligently displayed window. Using skin change technology of the security class software, a user can be informed intuitively and vividly that whether the processing equipment used by the user is safe or not.