The strut-and-tie model (STM) is an emerging procedure for the design of D-regions in concrete bridges. It is becoming one of the cutting edge research areas in structural engineering. Based on the concept and formation of strut-and-tie models, the typical D-regions existing in concrete bridges and their configurations are expounded. The criterion to develop appropriate strut-and-tie models and general procedures for dimensioning the D-region of structures are also discussed. According to AASHTO LRFD (2004), the application of the STM to design a typical anchorage blister is exemplified. At last, the origin and the state of the art are reviewed, and the current research areas are pointed out.