A hand dryer device cooperated with an airflow driver includes a first housing, a second housing, and an airflow driving unit. The first housing has a first body and a first extension portion. The second housing has a second body and a second extension portion. The second body is connected to the first body for defining an accommodating space, and the first and second extension portions together form a concave annular structure having an extension space. The airflow driving unit includes a sensor, a control module and an airflow guiding structure. The sensor is disposed on the outer surface of the first housing and/or the second housing. The sensor detects and outputs a sensing signal. The control module receives the sensing signal and outputs a control signal. The airflow guiding structure is disposed adjacent to an air outlet and extends to the extension space.