Director General Li Pumin of the National Development and Reform Commission told reporters that measures to stimulate consumption and halt a decline in investment would start having an effect in the final quarter of the year.
"I am confident we can achieve the annual growth target," Li said.
China's urban fixed-asset investment grew 16.5 per cent in the first eight months of 2014 from the same period last year.
Fixed-asset investment contributes about 50 per cent of annual economic growth in China, so even a slight drop-off is seen as worrisome.
Li said the decline should be offset by progress in ongoing water conservation projects in which China is investing almost USD 100 billion. He said 172 other major water projects were planned, but didn't give a figure for the dollar amounts involved.
China's economy, the world's second largest, has continued to slow this year, leading to speculation that it will fall short of the 7.5 per cent target, barely half of 2007's peak of 14.2 per cent.
