The present invention relates to an automatic excrement processing device comprising: a cup unit (10) worn on a portion of a user at which the excretory organs are located, and forming a space (11) in which urine is suctioned that is partitioned from a space (13) in which feces is suctioned an excrement processing main body (60) connected to the cup unit (10) and suctioning excrement discharged into the cup unit (10) and storing same a sensor unit provided on the cup unit (10), connected to the excrement processing main body (60), and sensing excrement a washing nozzle unit (21) performing a washing function a suctioning nozzle unit (49) suctioning excrement and a drying nozzle unit (31) performing a drying function. The present invention has the advantages that the device provides a good feeling when worn, and wash excrement processing is possible through accurate sensing of excrement.