The nations, meeting in Manaus, Brazil in November 26, also discussed supporting a 40 percent reduction in global emissions by 2020.
The meeting comes shortly before the key global summit on climate change in Copenhagen, Denmark.
The Amazon nations agreed on broad principles rather than concrete steps, correspondents said.
Brazilian President Luiz Inacio Lula da Silva chaired the meeting of delegates from Bolivia, Colombia, Ecuador, Guyana, Peru, Venezuela and Surinam, with French President Nicolas Sarkozy representing French Guiana.
At the summit, the Brazilian government presented its efforts to reduce destruction in the Amazon as a key part of its strategy to combat climate change.
Earlier this month, Brazil's government said the rate of deforestation in the Amazon had dropped by 45 percent - and was the lowest on record since monitoring began 21 years ago. It said that just over 7,000 sq km (2,700 square miles) had been destroyed between July 2008 and August 2009. Brazil is seeking an 80 percent reduction in the deforestation rate by 2020. The environmental group Greenpeace has welcomed the latest drop but says there is still too much destruction in the rainforest.
Earlier this month, Brazil said it aimed to cut its carbon emissions by at least 36% below 1990 levels by 2020.