In recent years, there has been an exponential growth of environmental sustainable buildings construction. Greater environmental awareness had induced the managers of building projects to "go green," and several studies have been conducted on the project delivery of green building. However, there is no comprehensive study that explores the important project management, whose decisions can significantly affect the environmental performance of building projects. Due to their pronounced benefits in a world of ever increasing climate change detrimental effects, green projects have been widely promoted. Moreover, their evaluation seems to be taking a snail pace. Against this backdrop, we propose a Gray correlation theory based on AHP and entropy methods to determine the weights of green project management evaluation index for rural engineering. The applied cases suggest that it is feasible to apply this method to green project management evaluation.