This paper applies the ecological footprint method to study the ecological footprint of lands, steels, cements, woods, and building wastes during construction projects, calculates the ecological footprint value from a statistical method. Based on a case study of a construction project in Xi'an city, the per capital ecological footprint is 4.57 times of Xi'an's ecological loading capacity in 2004, meaning a deficit. This paper presents some suggestions decreasing the ecological deficit in construction projects and reducing the energy consumption, which ensures a sustainable development of ecological footprint.