Cats may poop everywhere because they are nervous, stressed, the litter box is too dirty, the location of the litter box is not private enough, or the location of the litter box is frequently moved. First, prepare a clean cat litter box and place it in a quiet corner. Do not change the location casually afterwards; after the cat poops outside, put the cat poop in the cat litter box, and then put the cat in it. After a few times, the cat will poop in the litter box.