Tianjin metro, also known as Tianjin rail transit, is in the service of urban rail transit system in Tianjin. Tianjin is the second city in the construction of urban rail transit system in China after Beijing. As of October 1, 2013, Tianjin metro had had four lines in total, with the total distance reaching 131 kilometers.

ACTEC undertookthe construction and maintenance of the public security 350 million wireless emergency command and communication system of Tianjin Metro.