The hacker attacked some web pages of Beijing's Tsinghua University on Sunday and put music featuring Arabic verses from Islamic scripture that said, "God is great, I am unafraid of death, dying a martyr's death is my ultimate goal," news site thepaper.Cn reported.
Instead of displaying links to university's departmental information, the site showed a photo of four hooded fighters on horseback with the flag of the Islamic State.
The home page of the university remains intact, and the original contents of the hacked Web pages have not been changed, state-run Global Times reported.
The university quickly shut down its server after the incident, and its Tsinghua National Laboratory for Information Science and Technology is investigating the incident.
A weak password on affiliated pages likely led to the incident, and no evidence has shown that hackers specifically targeted Tsinghua University, it said.
Although some overseas hackers have previously attacked websites in China, this is the first time that IS has been involved in the hacking of a university website in China, if the incident is in fact confirmed to be the work of the IS, the daily quoted an expert as saying.
He noted that it is difficult to trace the hackers unless they claim responsibility.
Chinese officials say that a number of Uyghur militants from restive Xinjiang province have joined the IS to fight in Syria.
A Chinese national has been executed by the IS last year.
"The hacker attack may have been conducted by the jihadist group, its supporters or hackers who only want to make a fuss," Zhu Yongbiao, assistant director of the Institute of Central Asia Studies at Lanzhou University, said.
"The hacking of China's top university would demonstrate IS' intent to attract public attention, extend its influence and incite panic, if IS is held responsible," Zhu said.
