Electronic thermostat control method for fuel cell system and fuel cell system

The invention discloses an electronic thermostat control method for a fuel cell system and the fuel cell system. The electronic thermostat control method comprises the steps: S1, determining the set temperature of cooling liquid according to the required power of a fuel cell; S2, determining the opening change rate of a first thermostat according to the difference value between the actual cooling liquid temperature and the set cooling liquid temperature; and determining the opening change rate of the second thermostat according to the temperature change rate of the cooling liquid; and S3, controlling and determining the actual thermostat opening change rate according to the first thermostat opening change rate and the second thermostat opening change rate. According to the electronic thermostat control method, the opening degree of the electronic thermostat can be adjusted according to the actual temperature change condition of the cooling liquid, the cooling system is good in stability and high in response s