Pumping displacement data recommendation method and device and pumping displacement control method and device

The invention provides a pumping displacement data recommendation method and a pumping displacement control method and device. The pumping displacement data recommendation method comprises the following steps: receiving working condition data of pumping equipment; searching recommended displacement data in a displacement table according to the working condition data, wherein the displacement table comprises a corresponding relation between the working condition data and the recommended displacement data; and sending the recommended displacement data to the pumping equipment. According to the technical scheme, the optimal displacement corresponding to the current working condition of the pumping equipment is directly determined through the server according to the received working condition data, the found optimal displacement is sent to the pumping equipment at the first time, the optimal displacement with the highest pumping speed under the real-time working condition is recommended for operators, and referen