Fuel cell system and method for controlling and regulating the same

Fuel cell system, comprising: a fuel cell stack having a plurality of fuel cells stacked together, which generate power by being supplied with reactive gas, and Supplying a reaction gas supply means, which is adapted to the fuel cell stack reaction gas, characterized, in that the fuel cell system further comprises: an idling-stop control and regulation means which adapted to, in a case that a predetermined condition during an idle-power generation, in which a lower current than during a normal power generation is produced builds up, an idle-stop step trigger to continue, however, to supply oxidant gas with a smaller amount of current than during the idling power generation of the fuel cell stack through the reaction gas supply means, wherein a small current is also generated during idle stop, but which is less than that during the idling is -Leistungserzeugung current generated by the fuel cell stack; To determine a cell voltage threshold value determining means which is adapted, if a lowest cell voltage of the fuel cell stack falls below a predetermined lowest cell voltage threshold value during the idle stop step; and a cell voltage recovery means which is adapted to recover a cell voltage of the fuel cell stack by using a fuel cell stack-sufficient oxidant gas stream through the reaction gas supply means to more is considered increased in a case of during the idling power generation, it has been determined that the lowest cell voltage is lower than the lowest cell voltage threshold value.