Abstract: On the basis of annual statistical analysis of both biological and energy consumption and ecological footprint of Tianjin, ecology carrying capacity value of Tianjin in 2004 is estimated at 0.32 hm², with average per capita ecological deficit of 1.53 hm², showing that ecology safety of Tianjin Ciy is seriously threatened and this tendency is increasing with time. This is likely to go beyond the capacity of the natural ecological system of Tianjin. On the other hand, it shows that the overall economic development of Tianjin and use of resources is moving from extensive and progressive to one of consumptive and conservative.