The report, delivered on Thursday by IAEA Director General Mohamed ElBaradei, said Iran had been truthful, in general, about key aspects of its "nuclear dossier," but warned that Tehran was continuing to work on uranium enrichment, despite persistent demands by Western governments that the country abandon the program.
Western countries say the program is geared toward the production of atomic weapons. Iran denies the allegations, saying it is directed towards providing energy.
"The IAEA report has destroyed all grounds for accusations," Gholamreza Ansari said at a news conference in Moscow, adding that Tehran hoped other countries would assist Iran in its cooperation with the UN watchdog.
Two sets of UN Security Council sanctions are currently in place against Iran over its refusal to halt uranium enrichment that could be used in both electricity generation and weapons production. A further round of more stringent sanctions has so far been blocked by China and Russia.
The ambassador also said that the United States sanctions against Iran were obstructing normal cooperation between Tehran and the IAEA.
Ansari added he was positive that some of the six countries involved in talks on the issue - the United States, Russia, China, Britain, France and Germany - would react negatively to the IAEA report.
Iran would, the ambassador went on, provide all necessary assistance to the IAEA director general during his next visit to the Islamic republic, and would also grant him the opportunity to visit the facilities he is interested in, as well as answering any questions he may have.