Abstract: In order to achieve detection and evaluation more ideally and objectively, data was used to check the analyzer system′s error of fabric structural parameters(FaCFAS) designed by ourselves.Comparing with hand-counting by experiment,the standardized method which can fulfill the requirement in errors of detection was determined,that is,for every sample,fourteen images were taken at different positions,and the average value was used as the final result.In the end,for the results obtained by the two testing methods,analysis of stability and variance was conducted using pilot samples.It indicates that the system is reliable and advantageous in automatic detecting yarn densities of the woven fabric and can be used as a new practical measuring means.