Energy saving has become a social focus nowadays. According to the statistics, the energy consumption on construction contributes to almost one-third of that on the whole society.At the same time, constructing consumption makes up 23% of the whole energy consumption on construction. As a result, it is of great necessity to find out how to control the consructing consumption.Based on the survey concerning the current situation of constructing consumption, the eassay puts up with the methods of classifying energy-consuming projects; analyses the source of construction consumption; builds a measuring model about energy consumtion in the construction phase using sub-project as research objects. In addition, referring to The unified national construction engineering foundation quota, we formulated energy consumption quota of these two sub-project respectively with an example of turkmen excavation and metal structure transportation. The research findings provide construcion enterprise with theoretical basis concerning saving energy and reducing carbon emission.