Abstract: The integrated ECLSS/TCS (Environmental Control and Life Support System/Thermal Control System) tests of the International Space Station (ISS) are system-level tests in ambient pressure for verification and acceptance of the overall performance of a single cabin or multiple cabins. This paper gives firstly a description of the environmental test requirements of the ISS, and the developments of integrated ECLSS/TCS tests for the US, European and Japanese cabins under the frame of the ISS program, including the test items, test functions, and test facilities. The characteristics of the integrated ECLSS/TCS tests are summarized and some suggestions are made for China to conduct this kind of tests.