The invention discloses a bridge health monitoring method and 
system. The method comprises the steps of S1, building a bridge structure theory vibration 
modal; S2, collecting 
bridge vibration data; S3, utilizing an 
information processing module, and performing real-time 
online data processing on the 
bridge vibration data; S4, utilizing a structure 
modal analysis module, and on the basis of the 
bridge vibration data and the neural 
network computing technology, automatically performing intelligent judgment on structure damage. By means of the 
wireless communication technology, the bridge structure dynamic 
modal, and the structure damage neural network recognition technology, the problems that in the prior art, only a local bridge structure is reflected, the bridge damage is not likely to berecognized, the cost of a data collection sensor is high, the service life is short, 
mass data cannot be analyzed in real time, online real-time monitoring is performed, and time and labor are wastedare solved, the automatic bridge health 
monitoring system can achieve integrated bridge 
structure analysis, automatic damage recognition and online real-time 
mass data analysis, and a large number ofmanpower and 
material resources are saved.