The invention relates to an electrifying, charging and discharging equipment for a portable photoelectric instrument, which comprises parts including a DC / AC inverter circuit, a first rectification filter circuit, a passive PFC (Power Factor Correction) circuit, a DC / DC conversion circuit, a PWM (pulse-width modulation) circuit, a second rectification filter circuit, an electrifying circuit, a singlechip control circuit, an operation display circuit, a discharge circuit, a protection circuit and the like. The portable electrifying, charging and discharging equipment for the photoelectric instrument is mainly used for the electrifying maintenance to various portable photoelectric instruments, and charging and discharging to nickel cadmium batteries, nickel-hydrogen batteries and lithium batteries used together with the photoelectric instruments, can organically integrate the main functions of stabilized voltage supplies and charging equipment, and integrates the functions of electrifying, battery charging and discharging and the like of the instruments. Therefore, the integration degree of support equipment for the portable photoelectric instruments is greatly improved.