The invention discloses an automobile heat management system and an electric automobile. The automobile heat management system includes a heat pump air-conditioning system, a battery pack heat exchange system, an engine cooling system, and a first plate-shaped heat exchanger. The heat pump air-conditioning system and the engine cooling system can exchange heat with the battery pack heat exchange system through the first plate-shaped heat exchanger. The heat pump air-conditioning system includes an indoor condenser, an indoor evaporator, a compressor, and an outdoor heat exchanger; a refrigerant inlet of the first plate-shaped heat exchanger communicates with an outlet of the outdoor heat exchanger via a battery cooling branch, or communicates with a first end of a first branch and a first end of a second branch; and a refrigerant outlet of the first plate-shaped heat exchanger communicates with an inlet of the compressor via a battery cooling backflow branch. Accordingly, automobile internal cooling and heating can be achieved, the battery can be cooled or heated, and the battery can work in a suitable temperature range; and the charge/decharge efficiency, the cruising ability and the service life of the battery can be improved and prolonged.