Lean Construction and building information modeling (BIM) technology have been produced since the last century, and have been spread rapidly in foreign countries in the 21st Century. In China, disadvantages in building industry are constantly displayed: non-guaranteed project time, low quality, and huge energy consumption. Lean Construction and BIM are advanced concepts and tools for construction industry, both of which are designed to reduce waste, improve building efficiency and create the greatest value. This thesis explores the integration of Lean Construction and BIM, proposes a basic integration framework and analyzes specific technology. Then the thesis gives a case study of Shanghai Tower, applying fuzzy-grey comprehensive evaluation method to calculate quantitative effect of the integration of Lean Construction and BIM.