Li promised to provide "any useful information acquired by China's satellites and intelligence services," Nigerian President Goodluck Jonathan, who is under immense pressure to crackdown on the Islamic militants after the schoolgirls' abduction, said after his talks with Li at Abuja.
There is no reference to Li's assurance, however, in the Chinese official media which is extensively covering his current Africa tour.
His pledge came as the US, Britain and France said they would send specialist teams to Nigeria to assist the Nigerian armed forces.
Boko Haram's recent attacks have caused a global outcry over the kidnapping of over 250 girls during the last month near the country's border with Cameroon.
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China could provide satellite imagery and equipment such as night vision goggles to the Nigerian military to help it monitor militant groups in convoys in the desert terrain of northeastern Nigeria, said Jacob Zenn, an Africa analyst at the Jamestown Foundation.
On a mission to woo resource-rich Africa, Li in his address to the World Economic Forum on Africa in the Nigerian capital today said China will earmark more than half of its foreign aid for Africa without preconditions.
"China will, as always, continue to increase its assistance to Africa in both quantity and quality to the extent of its ability, ensuring that more than half of its foreign aid will go to Africa," Li was quoted as saying by state-run Xinhua news agency.
The Chinese Premier has completed his visit to Ethiopia on the first leg of his Africa tour.
From Nigeria he is due to visit Angola and Kenya.
China is investing heavily in Africa in recent years supporting the construction of infrastructure projects and has offered significant preferential and commercial loans for 92 projects, worth a total of USD 11.3 billion between 2010 and 2012, the Xinhua report said.