The invention provides a high-frequency communication link establishing method and system, and an electronic device. The high-frequency communication link establishing method comprises the steps of establishing a low-frequency communication link with a first base station; interactively obtaining geographical positions of the first base station and a terminal; calculating a physical distance with the first base station and a receiving initial range of a high-frequency band beam; in the receiving initial range, receiving the high-frequency band beam sent out by the first base station in a search initial range, wherein the search initial range is obtained by calculating according to the physical distance; in the receiving initial range, performing high-frequency band beam search and performing information interaction with the first base station till a strongest receiving signal beam pair is obtained; and establishing a high-frequency communication link with the first base station on the strongest receiving signal beam pair. According to the high-frequency communication link establishing method and system, and the electronic device, by employing high-low frequency geographical position sharing, estimated search and the receiving initial range, the whole-space search is reduced to the initial range directed search, so the search complexity is reduced, the time delay is shortened, and the overhead is reduced.