| The establishment of sustainable developmental ecological city is becoming a hot-topic of world. This paper assessed the sustainable development of ecological city synthetically using the model of ecological footprint from the angle of quantitative monitoring. M.Wackernagel etc. presented and improved a model of ecological footprint, and it is a new synthetical index of measuring the impact of human's consumption on ecosystem.We can get a result through comparing the data between the area of consumed for productive plant and the area of supplied for productive plant.The result can help to judge that the developemt is in the extension of carrying capacity or not.Based on the theory of ecological footprint, this paper counted the relevant data of Harbin in 1997, 1999 and 2001, and the consumption is estimated which includes food, clothing, household facility, fuel and housing.The results indicated that the per capita ecological footprint of Harbin increased with years from 1.997 hm~2 in 1997 to 2.087 hm~2 in 1999 till 2.298 hm~2 in 2001, and the amplitude of per capita ecological footprint is 4.5% and 10.1 %; the per capita ecological deficit is 1.161 hm~2 in 1997 and 1.250 hm~2 in 1999 and increased to 1.416 hm~2 in 2001. Although the estimation is conservative, the total areas of ecological consumption of residents exceed the natural areas greatly. Harbin city is an apparent "ecological deficit" area. The fact indicates that the ecological footprint had already been beyond bio-capacity of ecosystem, and the ecosystem is under the stress of excess exploiture. The habitant relied on the ecosystem beyond the urban borderline for essential living demands.Along with the urbanism, the sustainable development of city becomes an important thesis. The ecological footprint becomes an essential index of assessment of eco-city and provides a scientific warrant for sustainable development of eco-city.
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