The safety inspection network of hydraulic engineering metallic structures and equipments was developed based on the Cloud platform technology. The experimental inspections of metallic structures in terms of the coating thickness, metal substrate thickness, welding defect and the structure stress were conducted in the under-constructed hydraulic projects in Shenzhen City. The results showed that the manual inspection data of the coating and metal thickness and the non-destructive testing scene photos and results can be transmitted to the cloud platform in real time through semi-automatic mode. Differently, the dynamic variation value of structure stress is automatically collected by the intelligent acquisition module and then wirelessly transmitted to the Cloud platform. By granting access rights to relevant personnel of quality and safety supervision department, they can ensure real-time supervision of safety inspection results and receive alarm information.