The invention discloses a fuel cell hybrid electric vehicle heat management system and method, a vehicle and a medium. The system comprises a galvanic pile cooling and heating loop, the galvanic pile cooling and heating loop comprises a radiator, a thermostat, a galvanic pile water pump, a galvanic pile and a galvanic pile temperature sensor which are connected in sequence, and the thermostat can control whether cooling liquid in the loop passes through the radiator; a battery cooling and heating loop which comprises a battery, a battery water pump, a battery temperature sensor and a battery three-way valve which are connected in sequence; the heating loop comprises a hydrogen combustion heater, a warm air core body, a heating loop rear end temperature sensor, a heating three-way valve, a heating water pump, a heat exchanger and a heating loop front end temperature sensor which are connected in sequence; a refrigerating loop which comprises an air conditioner and a cooler which are connected with each other, and the cooler exchanges heat with the battery cooling and heating loop; the electric pile cooling and heating loop and the battery cooling and heating loop are both connected with the heating loop, and the refrigerating loop is connected with the battery cooling and heating loop. The electric pile and the battery can be warmed, and a driver can be warmed.