"Both countries have developed robust and capable space services", the report said.
China had set up a strategic support force to integrate cyberspace, space and electronic warfare capabilities into joint military operations, it claimed.
China has demonstrated an anti-satellite missile and is working on a laser that could attack USA properties in space.
Efforts by Russian Federation and China to develop space technologies are challenging United States dominance in the space race and threaten to cripple its galactic security supremacy, a new report by the Pentagon has warned.
"The PLA owns and operates about half of these ISR systems, most of which could support monitoring, tracking and targeting of U.S. and allied forces worldwide, especially throughout the Indo-Pacific region", it said.
China's Foreign Ministry on Tuesday said the U.S. allegations were "groundless", as cited by Bloomberg. "So this may lead to the reality of the weaponization and endangerment of outer space".
In September 2018, after Trump's announcement of the Space Force, Moscow warned Washington against deploying weapons in space and urged the global community to adopt an agreement preventing such deployments.
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They have also developed the command and control systems needed to deploy these capabilities as weapons.
One threat is a result of the successes in space.
"The number of satellites and debris on orbit will grow concurrently, making tracking satellites, discriminating threats from non-threats, and predicting and preventing collisions a greater challenge", it said.
China's debris technology is "dual-use because it could be used to damage another satellite", according to the Defense Intelligence Agency.
Of about the 21,000 large space objects that are least 10 centimeters (4 inches) in size, only about 1,800 are active satellites. On his first full day on the job in January, acting Secretary of Defense Patrick Shanahan told senior leaders at the Pentagon to 'remember China, China, China.' One area of relative cooperation so far has been in space exploration. The rest is debris, including parts of spacecraft.
China and Russian Federation have developed counterspace capabilities, including ground-based missiles aimed at satellites, jamming of signals to or from satellites, ground-based directed energy weapons, kinetic-kill vehicles, space-based counters and more.
"Space is fundamental to USA prosperity", the Pentagon official said.
Space is the common property of all mankind, not the private property of the Americans, Chinese foreign ministry spokeswoman Hua Chunying said at a briefing.
Space is the enabling domain for many capabilities, from hand-held devices to precision navigation.