The infrastructure land, air and underwater multi-robot collaborative maintenance system includes ground-based detection robot (roadbed maintenance robot, field detection robot), UAV intelligent inspection system, and underwater/water surface robot intelligent maintenance system, which have unified operation and the information management system, it can jointly manage a variety of robots to work at the same time, through land, air and underwater three-dimensional data, the quality of infrastructure is comprehensively evaluated to ensure the operation safety of complex structures such as highway and railway bridges.