Water distribution device and fuel cell system

The invention provides a water distribution device and a fuel cell system, the water distribution device comprises a shell, a driver, and a water absorption material, a gas inlet pipe, a rotating shaft, a gas outlet pipe and an impeller which are arranged in the shell, and the water absorption material is arranged on the side wall surface of the shell; the air inlet pipe extends into the shell from the top end of the shell; one end of the rotating shaft extends into the shell from the bottom end of the shell and extends into the outlet end of the air inlet pipe, and the other end of the rotating shaft is connected to a driving shaft of the driver; the air outlet pipe is arranged at the top end of the shell and is spaced from the air inlet pipe; the impeller is connected to the end, extending into the shell, of the rotating shaft and spaced from the outlet end of the air inlet pipe. Dynamic calibration of the rotating speed of the driver can be realized according to the water yield of the fuel cell, that is, t