Abstract: In order to improve the rationality and scientific nature of the field monitoring system during the period of highways construction， based on the monitoring situation of Foshan first ring road， the paper improves the traditional monitoring system in theaspects of risk monitoring item selection， data reporting and results analysis. Engineering applications indicate that the monitoring item determination method with the theory of cost and loss is helpful to improving the scientific nature of the monitoring system. The data reporting system based on Internet has solved the problem of the lag in data report and the difficulty in message exchange and so on. The combined forecast model with wavelet network can enhance the accuracy of trendency prediction.