The invention discloses a system logic-reused memory self test controller realization method and device. The method comprises steps: S1, a system logic of a periphery of a memory specified port is tracked, and a topological relation of a corresponding circuit is recorded; S2, which ports in the topological relation recorded in the step S1 have reusability and the reuse realization mode are analyzed; and S3, according to the port reusability obtained in the step S2, a memory self test controller conforming to a corresponding time sequence is designed, and the system circuit is changed and adjusted. The device is used for executing the above method. the method and the device have the advantages of simple realization method, small area and low power consumption.