The invention discloses relates to the filed of sanitary ware, and in particular to a defecating device cup structure and a defecating device. The defecating device cup structure comprises a base and a flexible cup arranged outside the base and connectable to the base. The flexible cup has a shape conforming to that of the base and encompasses the base and a periphery of the user's buttocks. The defecating device cup structure further comprises a cup space adjusting unit, the cup space adjusting unit being able to adjust a space between the flexible cup and the user. By providing the cup space adjusting unit in the flexible cup, a portion of the flexible cup in contact with the user may have a better tightness, whereby guaranteeing a good cleaning effect and achieving a better wear comfort.
