The signal stations of the controlled waterway is an indispensable part for commanding water transportation safely and orderly in the upper reaches of the Yangtze River due to the natural drawbacks,such as narrow water and rapid flow.The traditional method which is based on the manual observation and VHF communication can’t satisfy the requirement of the high density traffic command.This paper analyzes the key technology,functional design and implementation of the system,which is based on the construction of the intelligent command system for the controlled waterway.It is expounded that the system overcomes effectively the shortcomings of the traditional passive command and lays a solid foundation for developing the channel service quality.