The invention provides an oilfield intelligent management system for adjusting pump efficiency, which is used for administrators to manage the corresponding oil pumping units arranged at a plurality of oil wells in the oilfield. at least one pumping unit control cabinet corresponding to the pumping unit, which is set at the oil well and connected to the pumping unit, operated by the workers, and used to control the pumping action of the pumping unit; the administrator terminal, which is controlled by the management and the management server, which are respectively connected with the oil pumping unit control cabinet and the administrator terminal. Among them, the pumping unit control cabinet has a parameter storage part, a pumping unit information storage part, a control cabinet screen storage part, a control cabinet input display part, a reference dynamometer generation part, a measurement part, a current dynamometer generation part, a comparison A determination part, a frequency conversion part, an adjustment frequency generation part, a control cabinet communication part, and a control cabinet control part.