The structure safety of bridges is the bottleneck of highway traffic safety and expedite circulation. Nevertheless sensing t echnology of bridge structure state is a new immature developing technique. What's more, bridge sensing system based on the internet o f things can be regarded as a new trend of bridge monitor structure system. According to the characteristics of bridge sensing, this pape r has proposed a bridge-IOT sensing system based on double points reliability method. This method can greatly improve the probability that real time data will be transmitted to remote monitor center in case of disasters Keywords—Double Communication, Internet of Things, Perception