Each time you raise the litter box, remember to take some of the kitty litter out of the box. Move the box onto the toilet seat (half way initially) until she is used to the concept. When she is comfortable, move the box completely over the toilet seat. Replace her litter box with a training box.
Originally Answered: How can I train a cat to use sand as toilet? Cat has natural. .. My cat Greyling "Biddy" Everest uses the human toilet instead of the litter box.
Thankfully, training them to use a human toilet is very achievable. Instead of having to deal with a foul-smelling litter box, here's how to toilet train your cat in a