The present disclosure provides a descaling apparatus of an electronic toilet bidet, the descaling apparatus comprising a descaling liquid storage tank, comprising a descaling agent chamber; a descaling agent storage box configured to house solid descaling agent and disposed in the descaling agent chamber; and a descaling apparatus connector disposed on the descaling liquid storage tank. The descaling apparatus connector comprising a first end in fluid communication with a descaling liquid inlet of the descaling agent chamber and a descaling liquid outlet of the descaling agent chamber and comprises a second end configured to be connected or disconnected to the electronic toilet bidet.