This drawing is a drawing of the electrical part of the underground parking lot. The contents of the drawing include: description of the underground parking lot+directory+material list ((strong current+weak current+fire protection+lightning protection+energy conservation), transformation and distribution system diagram of the underground parking lot, distribution box system diagram of the underground parking lot (fan, water pump, emergency, lighting, fire shutter, submersible sewage pump, etc.), television, telephone, network system diagram (parking lot management system