The invention discloses an automobile comprehensive heat management system which comprises a motor cooling loop and a battery heat management system, wherein the motor cooling system comprises a firstwater pump, an all-in-one controller, a heat exchanger, a first three-way pipe, a radiator and a first electronic three-way valve which are sequentially connected end to end. A battery heat management loop comprises a battery cooling loop and a battery heating loop, wherein the battery cooling loop comprises a power battery, a second three-way pipe, a second water pump, a heat exchange plate anda second electronic three-way valve which are sequentially connected end to end; and the battery heating loop comprises a power battery, a second three-way pipe, a first electronic three-way valve, afirst water pump, an all-in-one controller, a heat exchanger, a first three-way pipe and a second electronic three-way valve which are sequentially connected end to end. According to the invention, aPTC heater is not required to be additionally arranged on the battery heating loop, and the power battery can be heated and warmed by directly utilizing the existing heat in the whole vehicle, so thatthe advantages of environmental protection and high efficiency are achieved, and the comprehensive control and management can be realized.