In recent years, architectural buildings have been taller and taller, the efficient use of construction lifting equipment makes a large influences on the success or failure of the construction project. Tower crane as the most popular lifting equipment, plays a key role in the construction work, which lifts about 50% of the amount of lifting needs in construction site. As the demand for tower crane increases, related accidents are increasing nowadays. In May of this year, the Korean ministry of employment and labor issued danger warning to the all over the domestic industry site which uses tower crane after recent two tremendous T/C accidents. In this study, firstly, we built up the TWRI (Towercrane Work Risk Index) model with combining major risk factors of equipment factor, humant factor and work factor. Then we simulate the model with real construction project case that is proceed presently, contrasting the disaster reported case with none-disaster reported case at the same time this year. This model can help building construction field management by identifying the coming up risk in tower crane related works easily.