Abstract: After analyzing the index parameters of the optical properties of textile,including the spectrum band eigenvalues,ultraviolet protection factor,and attenuation coefficient,a textile transmission properties detecting system is designed based on VC++ 6.0 by using PCI9812/10 data acquisition card as hardware platform and Microsoft Access as database.This system characterizes in an all-round way the optical properties of textile under different spectrum bands including ultraviolet light,visual light and infrared light.It realizes to evaluate protecting ultraviolet characteristic of textile according to the national evaluation criterion for solar ultraviolet radiation protective properties of textiles.This system provides technological reference for the textile designers and users.