In this paper, temperature sensors, strain sensors, and displacement sensors are systematically integrated with the dynamic weighing system through sensor network technology to complete the safety monitoring of bridge structures, timely detect bridge damage, provide technical basis for bridge maintenance and management, assist the daily traffic management of Bridges, and ensure the safe operation of Bridges. In this paper, the overall architecture of the system, sensor network system, data acquisition system and software system are elaborated in detail. The discussion of this paper provides a good health monitoring application case for the field of bridge engineering, and has important reference significance for the engineers and technicians engaged in this field.