Based on the event every year for selecting the annual important advances about science, technology and engineering held by our publishing house, with the same principles of evaluating within each branch, putting quality before quantity, and giving facts in time order, 10 important scientific achievements, 10 important technological achievements and 10 important engineering achievements in China in 2012 were selected from a lot of scientific news in Science and Technology Review, other key academic journals and scientific newspapers. These achievements were introduced by the Editorial Department of Science and Technology Review.