Progress　towards　high　performance　X-ray　detection　and　dynamic　imaging　applications,　including　nondestructive　inspection,　homeland　security,　and　medical　diagnostics,　requires　scintillators　with　a　high　light　yield,　a　reasonable　decay　time,　low　cost,　and　eco-friendliness.　Recently,　copper　halide　scintillators　have　drawn　tremendous　attention　due　to　their　outstanding　radioluminescence　performance.　Here,　we　first　employed　beta-Cs3Cu2Cl5　as　a　high-performance　scintillator,　with　a　photoluminescence　quantum　yield　(PLQY)　of　94.6%,　a　radioluminescence　light　yield　of　34　000　+/-　4000　photons　per　MeV,　a　low　detection　limit　of　81.7　nGy(air)　s(-1),　and　good　operational　stability　under　a　total　X-ray　dose　of　174.6　Gy(air)　in　air.　In　addition,　this　scintillator　presents　a　high　spatial　resolution　of　9.6　lp　mm(-1)　at　the　modulation　transfer　function　of　0.2　and　a　superb　performance　at　60　frames　per　second　in　our　X-ray　imaging　system.　Overall,　this　highly　efficient　scintillator　demonstrates　outstanding　comprehensive　performance　and　shows　great　potential　for　broad　applications　in　X-ray　detection　and　dynamic　imaging.