The utility model relates to a fuel cell system and fuel cell automobile, fuel cell system wherein includes fuel cell and fuel cell cooling pipeline, and the fuel cell cooling tube is equipped with the electric heater who is arranged in cooling off for fuel cell the coolant heating of pipeline when fuel cell starts on the road, and electric heater is used for connecting power battery in order to get from power battery, fuel cell system still including being used for the heat retaining heat exchanger to power battery, establish ties in fuel cell cooling pipeline by the first group port of heat exchanger, and the second group port of heat exchanger is arranged in establishing ties at power battery cooling pipeline. The utility model discloses can effectively solving among the fuel cell automobile fuel cell performance under low temperature environment, relatively poor be difficult to to start and the waste heat discharge during fuel cell normal operating causes heat waste's problem.