Equipped with a powered system and method for spacecraft

The present invention discloses a system and method for adding electrical mounted with a spacecraft, the system comprising: a power supply unit provided in the mounting on the spacecraft, the pneumatic pressure switch, the delay control unit; electrically connected to a power supply unit provided with mounting Spacecraft electrical load, for electricity to power a load; pneumatic pressure switch, an external pressure detector mounted on the spacecraft, and the outside air pressure drop in the control unit to start the preset delay threshold; delay control unit is used to power after counting a predetermined length of time to control the power supply unit supplies power to electrical loads. The present invention is mounted on the outside air pressure by detecting a change in the spacecraft, and delay control means to control the power of the electric power to the load independent manner mounted spacecraft, the spacecraft is mounted to improve the reliability of power supply, and may be a conventional passive complementary powered mode, self-powered spacecraft to start after the passive power-fail guarantee equipped spacecraft continue to complete the follow-up tasks.