The utility model relates to a water heater discharger and water heater using the same device, which comprises a rising pipe floating-and-sinking device and a rising pipe control mechanism, wherein, the floating-and-sinking device includes a floater disposed in the heat insulation water storage tank; the internal superior part of the floater is an air core with the upper part arranged with a electromagnet and a spring with a control mechanism; one end of the spring is arranged on the internal top of the floater, while the other end is connected with an iron pipe at the internal inferior part of the air core of the floater, and the spring force can ensure that the nozzle of the rising pipe is above the water surface inside the heat insulation water storage tank; inside the iron pipe is nested a rising pipe matched with the diameter of the iron pipe, and the nozzle at the other end of the rising pipe passes through the heat insulation water storage tank to connect with a discharge valve; the control switch of the control mechanism of the electromagnet is arranged at the part of the heat insulation water storage tank convenient for operation. With the water heater discharger provided by the utility model, the water heater can be used once turned on and has the advantages of water resources saving, being convenient for user, simple structure, low cost, frost and explosion protection, safe use and convenient manufacture and maintenance.