This study describes the status quo of domestic and international environments index, proposes the purpose and significance of the capital city environment construction index. On the basis of studying the basic theory and the index system of the environment index theory, put forward the concept of capital city environment construction index, its content and analyzes the principles and construction methods of environmental index’s three most commonly used indicators system, namely, the DPSIR model, Life Cycle Assessment (LCA) model and basic index system.