Abstract: An inspection system for inspecting optical assemblies of a LiDAR which includes a transmitting optical assembly at a transmitting end and a receiving optical assembly at a receiving end. The inspection system includes: a detection laser and a detection probe. The detection laser is configured to emit a detection laser beam that passes through the transmitting optical assembly and/or the receiving optical assembly, and exits the LiDAR or is incident to the detection probe. The detection probe is configured to receive the detection laser beam or an echo of the detection laser beam after being reflected off an object, and convert it into an electrical detection signal. The inspection system further includes a signal processing unit that communicates with the detection probe to receive the electrical detection signal, and is configured to determine an operation state of the optical assemblies based on the electrical detection signal.