Abstract: Two major constraints in the sustained operation of submarines are the abominable air quality and thermal discomfort in cabins. In order to solve these problems，some researches were reviewed in this paper，and showed that the thermal senses were quite different due to the diversity of races and regions. Therefore，the standards derived from developed country are not suitable for instructing air-conditioning system design in China，not to mention that in the deep ocean submarine where the environment is much more complex. By combining the method of subjective questionnaires and objective physiological parameters，the submarine environment with good air quality and thermal comfort specific was developed. Regarding these issues，several measures for improving air quality were also suggested. The results show that with the proper standard and multiple measures，thermal comfort state and air quality can be significantly improved.