The cleaning fluid supply system includes a first fluid storage device, a second fluid storage device, a pipeline assembly and at least one fluid drive device, and they are all mounted on the base. The pipeline assembly is provided with a main pipeline, a first branch and a second branch. The main pipeline is configured to supply the cleaning fluid to the cleaning robot. The first branch is communicated with the first fluid storage device, and the second branch is communicated with the second fluid storage device. The first branch and the second branch are both communicated with the main pipeline. The at least one fluid driving device is configured to drive the fluid in the first fluid storage device and the fluid in the second fluid storage device to flow to the first branch and the second branch, respectively.