The invention discloses a power control system for a hybrid system. The power control system for the hybrid system comprises a vehicle controller, a motor driving management system, a battery management system and an engine management system. The vehicle controller is connected with the motor driving management system, the battery management system and the engine management system through a first CAN bus and a second CAN bus which are parallel to each other; in a traditional state, the vehicle controller communicates with the engine management system through the first CAN bus in a complete mode and communicates with the motor driving management system and the battery management system through the second CAN bus in a complete mode; and when a fault exists in the first CAN bus, the vehicle controller communicates with the engine management system through the second CAN bus in a simplified mode. The invention further discloses a power control system for a pure electric vehicle.