Based on green building development, it has become an inevitable trend to promote urban development pattern transformation and to realize the city green, ecology, sustainable development. In such circumstances, it becomes very important how to apply green building assessment system scientifically and accurately, whether green building is real energy-saving in operation stage. This paper will use the established POE system of environmental performance of green residential building. We will make a case study for a green residential building in the cold region and it aims at verifying its scientificity and rigor. After evaluation, the POE system provides technical support for green residential building in our country and so on related work. (C) 2016 The Authors. Published by Elsevier Ltd.