Dielectric ceramics capacitors (DCC) with excellent energy storage performance (ESP) and charge-discharge performance (CDP) is very critical in the field of advanced electronics and power systems. A strategy that improves the ESP of 0.6Ba(Zr 0.2 Ti 0.8 )O 3 -0.4(Na 0.5 Bi 0.5 )TiO 3 (BZT-NBT) ceramics was proposed via Sr 2+ doping. XRD and SEM results confirmed that 0.6(Ba 1- x Sr x )(Zr 0.2 Ti 0.8 )O 3 -0.4(Na 0.5 Bi 0.5 )TiO 3 ( x = 0, 0.1, 0.2, 0.3, 0.4) (BSZT-NBT) ceramics formed dense and stable perovskite solid solutions . The relaxor ferroelectric (RFE) properties of BSZT-NBT ceramics were also well proved by dielectric behaviors. A large recoverable energy storage density ( W rec ) and large efficiency ( η ) of 3.72 J cm −3 and 94.03 % ( x = 0.3) can be simultaneously obtained at 289 kV cm -1 . ESP of BSZT-NBT ( x = 0.3) ceramics at 180 kV cm -1 exhibit good frequency (1−100 Hz) and temperature (room temperature (RT)-120 °C) stability. BSZT-NBT ( x = 0.3) ceramics at 120 kV cm −1 exhibit a prominent power density ( P D ) and rapid discharge rate ( t 0.9 ) of of 37.62 MW cm −3 and 70.6 ns. All evidences confirm that introduction of Sr 2+ into A-site of barium titanate-based ceramics could effectively improve ESP.