Abstract
This paper researches on the causes of the urban waterlogging after rainstorm, and studying on wisdom and experiences of urban canal system against urban waterlogging in ancient China. It is shown that urban canal system was of organic and multi-functions, being titaled as “the blood circulation of city” and that rivers were as the trunk drainage canals, with great density and section for flood passing, tremendous storage capacity, and perfect management. The Forbidden City and Ganzhou are two examples. Enlightenment from ancient wisdom and experiences will help us to solve urban waterlogging problems.