Bladeless ceiling fan capable of adjusting airflow field pattern

The invention provides a bladeless ceiling fan capable of adjusting an airflow field pattern. The bladeless ceiling fan comprises an airflow generating assembly, a first airflow guiding piece, a second airflow guiding piece, an air volume adjusting and controlling assembly, an outer ring structure and an inner ring structure. The airflow generating assembly is used for generating airflow, and theairflow flows into the first airflow guiding piece and the second airflow guiding piece to form outer ring airflow and inner ring airflow. The air volume adjusting and controlling assembly is used foradjusting the flow rate of at least one of the outer ring airflow and the inner ring airflow. The outer ring airflow flows into the outer ring structure and forms outer ring axial airflow to be output from the outer ring structure. The inner ring airflow flows into the inner ring structure and forms inner ring axial airflow to be output from the inner ring structure. When the flow rate of the outer ring airflow is greater