Obama satisfied with G20 summit outcome

He also pledged to help those most vulnerable in the world, saying he would seek authority from the U.S. Congress to enable 448 million dollars to be diverted to help African and Latin American nations.

These "future markets" would one day drive economic growth, Obama said.

On the implementation of a better regulatory system, Obama stressed the need to "put an end to bust and bubble economic policies," and highlighted his agreements with the G20 partners on greater transparency and new regulations on hedge funds and tax havens.

The president acknowledged that it's not easy to make a deal and not everything was solved since "each country has its own non-negotiable issues," and more work needs to be done.

"This (summit) is not a panacea but it is a critical step," he said, "but we may have to take additional steps until we get it right."

Obama admitted that his country "may not always have the best answer" to the problems the world faces.

"Ultimately the challenges of the 21st century cannot be met without collective action. Agreement will almost never be easy, and result will not always come easy. But I am committed to respecting different points of view and to forging a consensus instead of dictating our terms. That's how we made progress in the last few days and that's how we will advance the deals in the months and years to come," Obama said.

"In a world that's more and more interconnected we all have responsibilities to work together to solve common challenges. And although it will take time, I am confident that we will rebuild global prosperity if we act with a common sense of purpose, persistence and the optimism that the moment demands," he added.

Editor:Zhang Pengfei