"Our next action will be to reverse-engineer the aircraft," Parviz Sorouri said.
"In the near future, we will be able to mass produce it. Iranian engineers will soon build an aircraft superior to the American [drone] using reverse engineering."
Iran says it captured the sophisticated US drone, a bat-winged RQ 170 Sentinel, on December 4 as it was flying in its airspace. It claimed a Revolutionary Guards cyber-warfare unit hacked the aircraft's flight controls.
US officials, who reportedly said the drone was flying a CIA mission over Iran, have expressed scepticism that Iran has the technology to perform such a feat. They said it was more likely the drone suffered a malfunction.