The invention provides a fan module and an electronic device. The fan module comprises a fan shell, a fan and a heat dissipation assembly; the fan shell is provided with an open side and a closed side surrounding the open side, wherein the open side is provided with a first airflow guide channel; the fan is arranged in the fan shell; the heat dissipation assembly is arranged on the open side and is provided with a second airflow guide channel connected to the first airflow guide channel; and airflow caused by the fan passes through the first airflow guide channel and the second airflow guide channel and is discharged so as to discharge dust. The electronic device comprises a machine body and the fan module, wherein the fan module is arranged in the machine body. According to the fan module and the electronic device, the fan shell of the fan module is not provided with an additional opening in the side wall or a dust collecting cavity, the guide channels allowing air to be discharged are arranged in the fan shell and at the heat dissipation assembly, and therefore the design of the shape and the size of the fan shell can be optimized.