It did not win, and James Cameron didn’t get the Best Director Oscar that time, but Avatar did win Best Visual Effects, Best Art Direction, and Best Cinematography.
James Cameron’s Avatar, which just lost the highest-grossing title to Avengers: Endgame last summer, was also nominated for Best Picture during its Oscars ceremony in 2010.
It was also nominated in several other categories, including Film Editing, Score, and the two sound categories.