The invention discloses a novel household multi-functional energy-saving power source which comprises a single-chip microcomputer, a master control circuit and a socket. Signals of the single-chip microcomputer are transmitted to the master control circuit which is used for controlling power-on and outage of the socket. The socket is connected with an electrocar charger or a household oxygenation pump. The master control circuit comprises a switch circuit, a time-delay circuit and an infrared sensor. The master control circuit is connected with measurement signals of the infrared sensor and after the measurement signals are judged by the single-chip microcomputer, whether time-delay actions are conducted is determined; the signals are transmitted to a switch circuit through the time-delay circuit to control whether electricity of the socket is on or off. The socket is connected with a cooling device, a heating device, or an electric fan or the electrocar charger or the household oxygenation pump. Problems that the oxygenation pump wastes electricity and energy while oxygen is added, the charging time of the electrocar is adjustable and household appliances (an air conditioning and the heating device) which waste much energy need to be closed after people leave are solved. The practical applicability is strong and the purpose of saving energy is achieved.