Abstract: To improve the inspection ability, the integrated technology based on electromechanical impedance (EMI) and ultrasonic guided waves techniques was proposed for defect detection and localization in composite plate. Structural health monitoring technology based on EMI technology has the advantages of high local sensitivity, non-model analysis, etc. It has unique advantages in the field of on-line monitoring of new material structures, such as composite structures for aircraft and spacecraft. Ultrasonic guided waves monitoring technology has the advantages of high detection efficiency, wide detection range and fast detection speed. It is particularly suitable for health monitoring of plate-like structures. This integrated technology based on EMI and ultrasonic guided waves techniques combines the advantages of the local high sensitivity of EMI technology and wide detection range of ultrasonic guided waves technology. Results show that local averaged value imaging method and data fusion algorithm can be used for data processing and fusion of structural health monitoring of composite plate. The location and imaging of the defects in the whole composite plate are achieved.