To determine the essence of the environmental carrying capacity (ECC), namely “threshold value of the human activities”, the paper established the optimization model of ECC using an inexact fuzzy multiobjective programming (IFMOP) method. It was solved to obtain the scale of economy, the size of the population, chemical oxygen demand (COD), sulfur dioxide emissions, and water and energy consumption using LINGO software in Wuhan city. Results showed that the available energy is the bottleneck restricting the economic development. And the available water resources and environmental capacity of sulfur dioxide played strong limit role. In the end, suggestion was proposed to further improve the Wuhan general urban planning.