The officials from the United States, Britain, Canada, Australia and New Zealand - known as the Five Eyes intelligence sharing network - made the comments following meetings with private companies in the U.S. innovation hub Silicon Valley.
From quantum technology and robotics to biotechnology and artificial intelligence, China was stealing secrets in various sectors, the officials said.
In response, Chinese government spokesman Liu Pengyu said the country was committed to intellectual property protection.
The U.S. has long accused China of intellectual property theft and the issue has been a key sore point in U.S.-China relations.
"The Chinese government is engaged in the most sustained scaled and sophisticated theft of intellectual property and expertise in human history," said Mike Burgess, the Australian Security Intelligence Organisation's director-general.
Persons:
Christopher Wray, Jim Bourg, Wray, Liu Pengyu, Mike Burgess, Burgess, we've, Zeba Siddiqui, Jamie Freed
Organizations:
Committee, Federal Bureau of Investigation, REUTERS, Rights STANFORD, FBI, Reuters, The, Australian Security Intelligence, Thomson
Locations:
Washington , U.S, California, China, United States, Britain, Canada, Australia, New Zealand, U.S, Valley . U.S, Washington, The U.S, Australian, Stanford , California