Found a solution:
In Cinnamon, an taskbar (panel) applet called "Expo" can show a thumbnail virtual workspace, contains all your worksapces and each workspace contains all your monitors.
Within this miniatured view of the workspaces, in each miniatured monitor, it shows a miniatured windows. We can just drag and drop the window from any monitor of any workspace to any other monitor of any workspace on this miniatured worksapces view.