Speaking at a forum debate titled "A Multipolar World?" in the Swiss city of Davos, Volkan Bozkir said: "If you do not change the structures which are irrelevant with today's realities, then the U.N. is not a success story."
The main structure of the United Nations was established after World War II. Members of the U.N. Security Council, which have the power to veto, are in effect the winners of the war.
"This system, which has been established for other scenarios, is not helping us with the new situations in the world," added Bozkir.
Turkish Prime Minister Ahmet Davutoglu called Thursday for the reform of the United Nations.