Torabi has joined his countryman Mehrdad Mohammadi who has signed a contract with the Qatari football club on September 1.
Torabi joined Persepolis in July 2018 and helped the Reds win two Iran Professional League titles, one Hazfi Cup and one Super Cup.
He will wear No. 99 in the Qatari club.
The 26-year-old midfielder has played 30 times for Iran national football team and scored six goals.