概述了地史重大转折期的环境变化学术讨论会４个方面的主要科学内容：古生代与中生代之交的全球环境变化，泥盆纪弗拉斯期与法门期之交的全球环境变化，元古宙与显生宙之交的全球环境变化和地史重大转折期环境变化的研究方法。围绕上述内容，评述了发言人和专题发言人的主要科学资料和科学思想以及本次会议形成的共识。 The main scientific contents of the four aspects of the symposium on environmental change during the significant turning-point of geo-history are summarized as follows: the global environmental change at the turn of the Paleozoic and Mesozoic Era, the global environmental change at the turn of the Devonian-Famennian Period of the Devonian, Research Methods of Global Environmental Changes at the Turn of the World and Epiphany and Environmental Changes during the Great Turning-point of Geo-history. In the light of the above, the main scientific materials and scientific ideas of spokespersons and topic speakers as well as the consensus reached at this meeting were reviewed.