"I told Mr Ahtisaari that
The statement said that Tadic would discuss the UN proposal further with the country's key political leaders.
The UN envoy told a news conference the plan would "promote sustainable economic development including Kosovo's ability to apply for membership in international financial institutions".
He added that a Nato-led peace force "will continue to provide a safe and secure environment... as long as necessary".
Ahtisaari declined to address the issue of Kosovo's ultimate status, saying this would be settled by the UN security council once he formally presents his plan, following a last round of consultations.
"I am convinced that we will find a way to continue to defend the national and state interests" over Kosovo, Tadic said.
A ministry statement said the plan "dramatically changes the current state borders of
Kosovo's Albanians welcome plan
Leaders of Kosovo's ethnic Albanian majority have however welcomed the UN plan saying that it "will end with independence" for Serbia's breakaway province.
"Kosovo will be sovereign like all other countries," Fatmir SejdiuKosovo , Kosovo's president, said after meeting Ahtisaari.
Prime Minister Agim Ceku, a former guerrilla in the Kosovo Liberation Army, said the document "is very clear for Kosovo's future".
The current UN plan does not mention independence for Kosovo, but includes provisions of statehood such as its own constitution, national symbols and possible membership of international organisations.
Subsequently, some politicians have predicted violence and secession, or partition.
Both Nato and the current UN mission have made contingency plans for a such a crisis.