The present disclosure provides a display method for operating systems, a display device for operating systems, and a multi-system terminal. The display method includes: running multiple operating systems simultaneously; and displaying each of the multiple operating systems in a preset display mode. The multi-system operating system that are run simultaneously is displayed on one or more display screens, and restarting a terminal is avoided when switching the operating systems, thus a user operates the multiple operating system simultaneously or separately, which facilitates user's operation and improves user's experience.