A report by China's Internet Media Research Centre published said the US has taken advantage of its political, economic, military and technological hegemony to spy without restraint on other countries, including its allies.
The operations have gone "far beyond the legal rationale of 'anti-terrorism' and have exposed the ugly face of its pursuit of self-interest in complete disregard for moral integrity," state-run Xinhua news agency reported.
The spying "flagrantly infringed international laws, seriously impinged on human rights and put global cyber security under threat," the Chinese centre said.
Chinese authorities have looked into the US National Security Agency (NSA)'s secret surveillance program code named PRISM, which is revealed by former NSA contractor Edward Snowden.
More From This Section
An investigation carried out by various Chinese government departments over several months "confirmed the existence of snooping activities directed against China," the report said.
Citing the documents released by Snowden, the report said US secret surveillance targeted the Chinese government and its leaders, Chinese companies, scientific research institutes, ordinary netizens, and a large number of cell phone users.