The invention discloses a water supply system of an intelligent foodstuff feeder and the intelligent foodstuff feeder. The water supply system includes supports, a foodstuff barrel, a manger, a water outlet pipe, a water inlet pipe, and a water tank; the foodstuff barrel is fixed above the manger through the supports; a water outlet of the water outlet pipe is positioned above the manger and under the foodstuff barrel; the other end of the water outlet pipe is connected in the inner part of the water tank; one end of the water inlet pipe is connected to a water pipe, and the other end of the water inlet pipe is connected in the inner part of the water tank; and the water tank includes a housing, a water pump, and a floating ball liquid level controller, wherein a second through hole for allowing the water inlet pipe to enter and a first through hole for allowing the water outlet pipe to pass through are formed in the top of the housing, the water pump and the floating ball liquid level controller are arranged in the housing, the water pump is fixed on the bottom of the housing, one end of the water pump is connected to the water outlet pipe, the floating ball liquid level controller is fixed on the upper part of the housing, and the floating ball liquid level controller is connected to the water inlet pipe. Compared with the prior art, the advantages of the invention are that the water supply system is simple in structure, can continuously and quantitatively supply water, and can achieve accurate ratio of water and feed.