Electrical engineering is electrical engineering, which studies the nature of electricity, power generation, transformation (step-up and step-down, four-phase AC-DC transformer), power transmission (high-voltage transmission), power distribution (distribution network), design, control and protection of power grid, design, manufacture, test, detection and protection of power equipment, research on insulation materials, performance of gas insulation, solid insulation and liquid insulation under high voltage, and so on.

Weak current is similar to automatic learning, such as the control of electronic equipment and electronic systems.