A　water　jet　ultrasonic　C-scan　automatic　imaging　system　with　a　six-degree　of　freedom　has　been　developed.　The　water　jet　coupling　mode　was　used　for　ultrasonic　detection　and　real-time　imaging　of　large　planar　components,　rotating　bodies　and　complex　curved　surfaces.　The　six-degree　of　freedom　industrial　mechanical　arm　was　used　as　the　movement　mechanism　of　clamping　the　transducer　to　enabling　the　profiling　scanning　of　the　complex　shape　components　of　the　ultrasonic　transducer.　The　real-time　imaging　of　the　workpiece　was　executed　by　using　the　tomography　method.　Emloying　C#　language　as　the　programming　environment,　an　ultrasonic　C-scan　imaging　detection　system　with　high　integration　and　suitable　for　various　working　conditions　was　developed.　The　experimental　verification　demonstrates　that　the　system　is　stable　and　reliable,　with　high　detection　accuracy　and　good　repeatability.　©　2025　Beijing　University　of　Technology.　All　rights　reserved.