A cat toilet device includes a bottom part, a seat and a top part. The seat has a lip extending inward therefrom so as to support the top part. The top part has multiple apertures and a side hole is defined through a side of the top part. The cat is trained to use the cat toilet device to save the need of the cat litter. A slot is defined in the top face of the seat and a cup is engaged with the slot so as to receive tools for clearing the cat toilet.
