TRANSPORT DEVICE, CLEANING SYSTEM, CONTROL METHOD, AND MAINTENANCE SYSTEM

A transport system, comprising: a cleaning main unit (100) comprising a body moving assembly and a cleaning assembly; and a transport accessory (200) comprising a displacement assembly having a greater obstacle-crossing capability than the moving assembly. The transport accessory (200) and the cleaning main unit (100) have a separated state, and in the separated state, the cleaning main unit (100) can operate independently. The transport accessory (200) and the cleaning main unit (100) have a combined state; in the combined state, the cleaning main unit (100) and the transport accessory (200) form a combination body, and the displacement assembly is located at the lower portion of the combination body, so as to drive the combination body to move. The cleaning main unit (100) further comprises a sensing assembly configured to, in the combined state, detect an environment where the combination body is located to generate a detection signal. The transport system further comprises a controller configured to contr