The invention provides an adjacent region configuration method and device, and relates to the communication field. The adjacent region configuration method and device can solve the problem that the voice call delay of user equipment in the CSFB technology is long. According to the specific scheme, the method comprises the steps of counting the frequency of switching from a first cell to other cells by one or more sets of user equipment within the preset time, counting the switching success frequency and generating N switching records, wherein the N switching records correspond to N second cells in a one-to-one mode, the switching records comprise the switching frequency, the switching frequency of the nth second cell represents the frequency of switching from the first cell to the nth second cell by one or more sets of user equipment within the preset time for the nth second cell in N second cells, N and n are integers larger than 0, and n is larger than 0 and smaller than or equal to N; deleting the second cells with the switching frequency smaller than a first threshold value in the N second cells in a switching list, wherein the switching list comprises the N second cells. The adjacent region configuration method and device are applied to adjacent region configuration.