The active Lamb wave based damage diagnostic technology is acknowledged as one of most encouraging the structural health monitoring methods.To resolve the problems in applications of the technique,such as bulk and complex monitoring system, the integration and miniaturization technology of monitoring system was investigated in this paper for metal structures.The system framework of the software and hardware was analyzed.The module of sensor network control and signal conditioning was developed.Combining USB data generation and acquisition equipment,the miniaturized system prototype was built with the system software designed and developed in LabVIEW,including system management and damage imaging and diagnosis.Experiments on the aluminum plate structure validated the reliability and accuracy of the integrated monitoring system.The result of the Experiments indicated that the system could fulfill the application requests of the active Lamb wave structural health monitoring technology,such as field testing and online monitoring etc.