The present paper introduces the working method of the transborehole synchronous apparent resistivity survey. Using the analytical method and the finite element method, the paper has calculated curve characteristics of transborehole synchronous apparent resistivity survey for spheroids and two-dimensional tabular bodies, and presented an imterpretation method.The method proves to be valuable in such aspects of application as accomplishing the connection and extension of transborehole objects and determining the distance between the object and the surveyed borehole as well as the attitude of the object. In the methodological test performed within a copper-gold ore district of Fujian Province, the method yielded satisfactory results as compared with the radio-wave fluoroscopic method. The method will surely play a special role in the detection of metallic and nonmetallic orebodies, karst caves and fault-block petroleum pools.