Chinese films and TV attract global audience in recent years, as is the case of Empresses in the Palace, the subtitle translation of which plays an important role. This paper attempts to make a case study of the TV drama Empresses in the Palace from the perspective of Eco-translatology. By exploring how the three-dimensional transformations are applied in its subtitle translation based on the statistical results, the paper aims to bring more enlightenment to China's film industry by discussing the practical translation methods and techniques. It can be concluded that translators need adapt to the translational environment and make adaptive selections for different dimensions of the subtitle translation.