This paper analyzes the present situation of environmental problems in China, starting from the idea of building green building, using wireless sensor networks, established a building environment monitoring system based on BIM. The system can monitor the indoor air quality, indoor temperature, illumination time and so on, and control of temperature in the interior of the building, and set the operating state of the air conditioning system, and analysis of sunshine hours, and establish rational control strategy. The System can control the construction of the internal environment of the parameters to meet the standard of green building, the establishment of intelligent, energy conservation, harmonious living environment. The practice has proved that the system can be used in the actual application of the BIM monitoring platform for the building of the indoor environmental quality monitoring and management. This verifies that BIM technology plays an active and effective role in the green building.