The third mainly discusses the especial matter taking place in Tianjin about the sail that carrying commissariat，for example，the sail is hastened，carried commissariat is freezed，drifted and scarcity，and discusses relative system aiming at these issue by government of Ming Dynasty and Qing Dynasty。
The fourth chapter mainly discusses the carried commissariat by sea，treats the thing about carrying commissariat through sea is implemented at long intervals under giving priority to Canal，stressly introduces the thing implemented in the sixth year of Daoguang。
The fifth chapter mainly discusses the commercial effect on Tianjin of carring commissariat by Canal。Mainly discusses the species and quantity of southern？autochthonism that carried into Tianjin by the sail that carrying commissariat，and the stimulative function on commercial flourish of Tianjin，and other trade rise。
The sixth chapter mainly discusses the culture effect on Tianjin of carring commissariat by Canal。Include the effect of language，belief，literature，literary and so forth。？
The seventh chapter mainly discusses the effect on Tianjin’s population，city layout，life of carring commissariat by Canal
Epilogue summarizes the main content of this paper through concise language，ang gives readers clear impress。
Key words：Ming Dynasty and Qing Dynasty；Tianjin；Carrying Commissariat by Canal