The present invention relates to an automatic treatment system of a leftover food treating device comprising a setting means for receiving an output voltage of a voltage supplying means and setting control signals of the leftover food treating device; a controlling means for receiving input data through the setting means and controlling the operational state of the leftover food treating device; a sensing means for inputting measured data to the controlling means; a driving means for receiving the output signals of the controlling means; a displaying means for displaying the operational states of the setting means, the sensing means, the driving means, and the controlling means; and an alarming means for displaying an alarm setting value through the displaying means and outputting a predetermined alarm sound, in the case of the alarm setting value of a program preset to the controlling means.