A trolley and method for loading and unloading cleaning robots into a trolley, including for storing, emptying and supplying energy to cleaning robots. The trolley includes an energy supply unit, storage compartments, each storage compartment having a charging contact which is designed to be contacted with a cleaning robot arranged in the corresponding storage compartment to supply the cleaning robot with energy, transport wheels configured to move the trolley over a substrate, a suction system having a foldable suction platform configured to empty one of the cleaning robots arranged on the suction platform, a lift system with a foldable receiving element configured to transport the cleaning robots individually by way of the receiving element in its unfolded state to the storage compartments and away from the storage compartments, and at least one door element configured to close or expose the foldable receiving element and the foldable suction platform.