Lou's comments were published hours after U.S. Federal Reserve Vice Chairman Stanley Fischer said policymakers were likely to raise interest rates this year, but that that was "an expectation, not a commitment".
Asked about the global economic situation, Lou said the problem was not with developing countries.
"Rather, it is the continued weak recovery of developed countries" that's hindering the global economy, he said.
"Developed countries should now have faster recoveries to give developing countries some external demand."
Lou welcomed the structural reforms in Europe as a positive development, but said geopolitics and the Syrian refugee crisis would have an impact on its economy.
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He described the slowdown in China's economy as a healthy process, but said policy makers need to manage it carefully.
"The slowing of China's economic growth is a healthy process, but it is a sensitive period. The Chinese government must make accurate adjustments, keeping the economy within a predictable space while continuing to promote internal structural reforms," he said.
Separately, a senior central banker said that China's stock market correction is "almost over", according to the China Securities Journal.
Yi Gang, deputy governor of the People's Bank of China told an annual meeting of the International Monetary Fund and World Bank in Peru that China's stock market has experienced several rounds of corrections, the newspaper reported on Monday.
The corrections have had limited direct impact on China's economy as Beijing has taken a series of measures to avoid systemic risks, Yi was quoted as saying.