The invention is suitable for the technical field of unmanned aerial vehicle routing inspection, and provides a water conservancy and
hydropower building construction self-
adaptive routing inspection unmanned aerial vehicle path
planning method and
system, and the method comprises the following steps: building a dynamic four-dimensional environment model based on an airborne multi-source sensor of an unmanned aerial vehicle and
construction plan data; based on the dynamic four-dimensional environment model, a preset key inspection point and a path
fitting algorithm, generating a three-dimensional space path matched with the surface form of the
terrain building; when the unmanned aerial vehicle executes an inspection task, sensing environment change in real time, and when an unforeseen obstacle is recognized or dynamic update sent by a construction BIM
management system is received, performing local path re-planning based on a composite cost function; according to the invention, the environment information and the
construction plan data acquired by the airborne multi-source sensor of the unmanned aerial vehicle can be fused in real time, and the dynamic change of the construction environment is accurately reflected. And local path re-planning is carried out based on the composite cost function, so that the unmanned aerial vehicle can avoid obstacles in time, and smooth completion of an inspection task is ensured.