The invention discloses a control method of a chemical process intelligent pump, which belongs to a pump control technology, a technological process device for realizing energy conservation of a chemical process pump in the prior art is complicated, and the control method comprises the following steps: writing startup rotational speed N0, writing a flow rate-power performance chart of energy conservation and setting target flow rate Q0 through an initialization module; leading the pump to be started up according to the startup rotational speed N0 and measuring actual power P when the pump operates at a certain rotational speed N1 by a power measuring module; using a control module to compare the measured actual power P with the flow rate-power performance chart to obtain actual flow rate Q when the pump operates at the rotational speed N1, and calculate through a formula that Q0/Q equals N/N1 to obtain rotational speed N when the pump achieves the target flow rate Q0; and using an output module to output the rotational speed N when achieving the target flow rate Q0 to a motor for driving the pump. The control method does not need to increase any sensing device in the technologicalprocess device and can carry out self-parameter detection and operation control on the pump to achieve the desired operation parameters of the pump, thereby improving the energy efficiency and being conductive to transformation of the existing device.