Superman Robots are powerful robots built to resemble Superman, usually with many of his powers. They were built by Superman, and serve a variety of purposes; from caring for the Fortress of Solitude, where they reside, to standing in for Superman to help him preserve his secret identity, to helping him fight villains.
Superman kept many of these robots in the Fortress of Solitude.
Whatever Happened to the Man of Tomorrow?
In the final Superman story arc of the Silver Age, the Superman robots helped him defend the Fortress from the final invasion of supervillains.