Metasurfaces are artificial structures that can finely control the characteristics of electromagnetic waves at subwavelength scales， and they are widely used to manipulate the propagation， phase， amplitude， and polarization of light. In this work， a bound state in the continuum （BIC） structure based on a metallic metasurface is proposed. By adjusting the metallic structure using CST and COMSOL software， a significant quasi-BIC peak can be achieved at a frequency of 0.8217 terahertz （THz）. Through multi-level expansion analysis， it is found that the electric dipole （ED） is the main factor contributing to the resonant characteristics of the structure. By leveraging the characteristics of BIC， an imaging system was created and operated. According to the simulation results， the imaging system demonstrated excellent sensitivity and resolution， revealing the great potential of terahertz imaging. This research not only provides new ideas for the creation of BIC structures but also offers an effective reference for the development of high-performance terahertz imaging technology.