The present invention relates to a device for measuring coffee TDS/yield, which can measure total dissolved solids (TDS) and a yield of brewed coffee and can output the same. The device for measuring coffee TDS/yield comprises: a first weight measuring unit which measures the weight of ground coffee; a second weight measuring unit which measures the weight of extracted coffee to a drip server; a TDS measuring unit which measures TDS of the extracted coffee to the drip server; a yield calculating unit which calculates a yield from the weight of the ground coffee, measured in the first weight measuring unit, the weight of extracted coffee, measured in the second weight measuring unit, and the TDS value, measured in the TDS measuring unit; and a displaying unit which displays the weight of ground coffee, the weight of extracted coffee, the TDS value, and the yield. Therefore, the device for measuring coffee TDS/yield can allow a user to easily and conveniently measure the concentration and yield of coffee by automatically measuring the weight of ground coffee and extracted coffee, measuring a TDS value from the extracted coffee, and calculating a yield accordingly.
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