The present disclosure relates to a 5G or pre-5G communication system to be provided to support a higher data transfer rate beyond a 4G communication system such as LTE. The present invention relates to a method and device which detects performance degradation of a cell in relation to wireless communication and analyzes the degraded performance. More specifically, an analysis device for analyzing performance degradation of a cell in a wireless communication system according to an embodiment of the present invention comprises: a data retrieval unit for acquiring, from a cell, first data measured through wireless communication of the cell, a compression/decompression unit for acquiring second data by applying the first data to a particular model in which reference data related to an indicator for the performance of wireless communication is set, and a performance degradation determination unit for determining whether the performance of the cell is degraded, based on third data derived from the difference between the first data and the second data, wherein the compression/decompression unit acquires the second data by compressing and decompressing the first data according to the reference data.