The invention discloses millimeter wave/terahertz security inspection equipment and a human body or article inspection method. The equipment comprises at least one first scanning system, at least onesecond scanning system, a main control computer and a position alignment system, wherein the first scanning systems are suitable for scanning a target and transmitting scanning information of the target to the main control computer; the main control computer is suitable for performing image processing on the scanning information of the target and determining a suspected region where the target exits; the position alignment system is suitable for making each second scanning system align to the suspected region; and the second scanning systems are suitable for scanning the suspected region and transmitting scanning information of the suspected region to the main control computer, so that clear imaging and recognition of the suspected region are realized. According to the method, the suspected region is determined through the first scanning systems, then the suspected region is precisely scanned through the second scanning system, therefore, the imaging resolution of the region where a suspect is located can be increased while the quantity of detectors is not increased, and a human body or an article can be quickly imaged.