Robert Li, founder and chief executive of Baidu, gives a speech at Baidu 2011 technology innovation conference/XINHUA-File
The investment will go toward building data centres and hiring staff for its online data-storage service, Baidu said in a statement, quoting Li Xinzhe, but without giving details.
Baidu also announced a new web browser for mobile phones, which this year became the most popular way people access the Internet in China.
The new browser will offer faster download times and tailor-made applications, Dow Jones Newswires reported.
Baidu has about 80 percent of the market in China, having benefited from the fallout between Chinese authorities and US search engine Google over its refusal to censor its search results.
