Apparatus and method for automatically receiving and treating excreta. The apparatus for treating excreta according to the present invention includes: a port with an excreta-receiving portion for receiving the excreta of patients; an excreta storage unit which suctions and stores excreta from the excreta-receiving portion; an excreta suctioning unit which is connected to the excreta storage unit; a wash water supply unit which supplies wash water to the port, wherein the port has an air spray nozzle and an air intake port connected to an air intake line; and a flow channel switching unit, one side of which is selectively connected either to the excreta suctioning line or to the air intake line which are connected through the excreta storage unit, and the other side of which is connected to the excreta suctioning unit.