Terahertz (THz) near-field imaging is an important technique that surpasses the diffraction limit of optics to achieve super-resolution THz imaging; therefore, it is crucial to investigate ultrafast dynamics processes on material surfaces. Although scanning tunneling microscope (STM) achieves atomic-level resolution, it imposes various challenges related to time scales. Early time-resolved methods derived from the inherent electrostatic approach of STM were limited by the bandwidth of electrical signal transmission. Furthermore, pump-probe methods based on optical signal coupling were restricted by the microstrip line bandwidth and severe thermal effects. Hence, due to having unique low thermal effect, high tunneling efficiency, and high stability, THz-STM has emerged as an imaging solution with both ultra-high temporal and spatial resolution of 100 fs and 0.1 nm, respectively. Besides, this technology has become a research hotspot in the field of terahertz near-field super-resolution imaging. This study discusses the developmental history from time-resolved STM to THz-STM, focusing on the fundamental principles and current status of THz-STM. It aims to offer guidance on the application and development of THz-STM technology in terahertz near-field super-resolution imaging.