The utility model discloses a water pitcher automatic drainage control system, inlet tube, outlet pipe, manual drain pipe and the stock solution meter of intercommunication are connected with motor M on the outlet pipe water pump QJ on the liquid storage pot, have connect the digital display instrument on the stock solution meter, motor M even has electrothermal relay FR1, and last contactor KM1 and the air switch QF1 of being connected with of electrothermal relay FR, air switch QF1 link to each other with three routes control switch respectively, wherein connect electrothermal relay FR2, emergency stop button ESB and the change over switch SA of series connection in proper order all the way, and change over switch SA is connected with combination contactor group, combination contactor group link contactor KM4, open a way contactor KM2 and red pilot lamp R are connected to the second way, closed contactor KM3 and green pilot lamp L are connected to the third way, three routes control switch and motor M are connected to digital display instrument and power module. To collect the liquid level of comdenstion water in the water pitcher and transfer the digital display instrument through the signal of telecommunication, and come opening of control drainage pump and stop, its reduction personnel operate the frequency, and the cost is lower, and simple easy operation.