The project of the office building of the People’s Government of Chagan Hada was initiated by the Norwegian government for helping with energy saving reconstruction in undeveloped areas of developing countries. By reconstructing the office building’s external walls, doors, windows, roofs and heating system, the coal consumption of the office building has decreased from 50kg/m2 to 23.8kg/m2, saving raw coal by about 26t each year. After the reconstruction, the temperatures of various zones in the office building have risen by 13°C to 15°C respectively. The project fully adopts existing building energy saving technologies and locally produced building energy saving materials. What’s more, it introduces building energy saving ideas of Norway and has reached three achievements: First, both strict working attitude and skillful operations were ensured in construction; second, demonstration effect was emphasized; third, importance was attached to ability development.