Under the circumstance of relocation of global economics, Taipei city must compete with the other cities to achieve a core city of Asia. City is a giant, dynamic and complicate system. To remain a certain quality of environment, it relies on a rational and effective management system. It includes urban design, urban construction and management. Urban design and urban construction exist in the reality of space. Upholding urban management bases on a complete and decisive administrative law.This study will analyze some laws of urban design reviews to be improved that provide references for fixing the law of Taipei in future. Including working process, reviews process, review content and proposal .Meanwhile, it offers a reference to other city and county that whether running the urban design law or not.