A low-emission energy-saving pulse engine master device for purifying ultrahigh-toxic waste gas and waste liquid universally comprises a combustion chamber, a tail nozzle, a fuel feeder, a gas inlet pipe, an exhaust pipe, a mixer, a feed valve, a gas inlet valve and a silencer. A tail gas preheating porous-medium heat accumulator pipe, a high-temperature porous-medium accumulator, a heat utilization work face, the exhaust pipe, an ultrahigh-toxic tail gas input pipe and a low-heat-value tail gas booster are arranged on the tail nozzle. A high-temperature preheating combustion chamber, a high-temperature stable-combustion combustor, an oxygen-enrich fresh air input pipe, a high-temperature tail gas and oxygen-enrich fresh air input mixer, a high-temperature on-duty high-flame generator, a high-energy fuel high-temperature reheating fine pipe, a high-temperature high-energy fuel pulse ejector, a waste liquid combustion agent high-temperature reheating fine pipe, and a high-temperature waste liquid combustion agent pulse ejector are arranged on the pulse high-temperature combustion chamber. The low-emission energy-saving pulse engine master device is used for the field of waste gas and waste liquid purification.