Multi-level map construction method and system and electronic equipment

The embodiment of the invention provides a multi-level map construction method and system and electronic equipment. The method comprises the following steps: acquiring point cloud data, color image data and inertial data; according to the point cloud data and the inertial data, determining the position and attitude of the laser radar in a global coordinate system; obtaining laser point cloud map data according to the position and attitude of the laser radar in the global coordinate system; obtaining a three-dimensional semantic map according to the laser point cloud map data and the color image data; and obtaining an object-level semantic map according to the three-dimensional semantic map. According to the embodiment of the invention, the multi-level map is constructed by integrating the data of the laser radar and the visual camera, the multi-level map comprises accurate three-dimensional point cloud information, environment semantic information and object level information, and high-precision, multi-level