A set of corrosion detection system，which simultaneously possesses “measurement，collection and storage” functions，has been successfully designed and developed using of electrochemical noise technology and sensor technology on the basis of the comparative analysis of the common corrosion monitoring technology，according to the corrosion environment，characteristics and mechanism of the key parts of ship；the corrosion characteristics and behaviors of the key parts of ship. For the corrosion detection system，the data acquisition frequency can be as high as 10 Hz，the potential measurement range is from -4 000 mV to 4 000 mV and the measurement accuracy to potential error is 1 mV.