This project belongs to the field of information construction technology, involving the intersection of civil engineering construction, information technology, materials science and other fields. Modern civil engineering is characterized by ultra-high structures, ultra-large spans, complex shapes, and huge scale. The construction environment is complex and changeable, the construction is difficult, and the construction risks also increase. Only by grasping the structural stress state parameters in real time and accurately, material parameters and environmental parameters can we effectively reduce construction risks and reduce engineering accidents. However, traditional monitoring systems have shortcomings such as untimely data collection, poor reliability and stability, low level of automation and intelligence, and high risk of on-site operations, which cannot meet the safety needs of project construction. This project introduces information technology into the construction monitoring system, integrates the advantages of RFID technology and WSN technology, and solves key technical problems in civil engineering construction risk control through theoretical research, technical research, field tests and other means. The main innovations are as follows: (1) Integrating active RFID technology with WSN technology, a wireless node with both data collection and transmission functions has been developed, which can realize "multi-hop" relay transmission of wireless nodes and solve the problem that previous wireless systems cannot bypass construction site obstacles. Technical problems; wireless nodes can be self-organized, and when one node fails, data can be automatically transmitted through other wireless nodes, greatly improving the reliability and stability of the system. This technology has obtained two utility model patents (ZL 2008 2 0153879.3, ZL 2008 2 0154025.7). On the basis of technological breakthroughs, we developed a wireless monitoring system based on active RFID technology that is more suitable for complex civil engineering construction environments, and obtained a software copyright (2013 SR034280); and realized the expansion of monitoring physical quantities from simple temperature to full coverage of key parameters such as strain and inclination angle, and have been applied in major projects (see Papers 4, 5, and 6). (2) Through process design and improvement, the sensor and the RFID tag are separated, breaking through the constraints of the previous backward cable temperature measurement technology on the application of concrete maturity methods, and enabling the concrete maturity method to be used in real-time evaluation of the mechanical properties of concrete entities. The technical approach of application has been greatly improved, creating the possibility for the widespread application of the maturity method in engineering, and the application of RFID technology in the field of concrete quality monitoring has been realized for the first time in China. This technology has applied for an invention patent (application number: 201010252603.2) and obtained a utility model patent authorization (ZL2010 2 0290916.2). This system can realize "multi-level hop" relay transmission of more than three wireless nodes, and the single point transmission distance exceeds 50 meters; the average error in evaluating the strength of concrete entities is less than 10%, and the accuracy is at the world's leading level, greatly improving civil engineering construction risk control capabilities. The project applied for 1 invention patent, obtained 3 utility model patent authorizations, obtained 1 software copyright, published 7 academic papers, two of which were SCI searched; developed a wireless monitoring system based on active RFID technology with independent intellectual property rights. The novelty search report issued by China Academy of Sciences and acceptance experts agreed that the research results are highly innovative and have generally reached the international advanced level. Since this system was successfully applied to the closure temperature monitoring of the mid-span steel structure of the Minpu Bridge and the quality assessment of the side span concrete in 2008, it has been promoted and applied in the construction of the Huangpu River Bridge of the Jinshan Railway, Shanghai Yuexing Global Commercial Center and Shanghai Center. It has realized the wireless, automated and intelligent monitoring technology, effectively improving the efficiency of construction monitoring, saving a large amount of manpower and material resources required for monitoring, reducing construction risks, and ensuring construction safety and quality. This system has greatly improved the informatization level of construction monitoring in my country, with significant economic and social benefits, and has broad application prospects in construction risk control of major projects.