Based on water inherent optical properties using AC-S and BB9, which were developed by WETlabs Inc, the backscattering and scattering coefficients of Lake Taihu waters had been obtained from Oct. 24th to Nov. 2rd, 2006. Based on data analysis, the models between backscattering coefficients and scattering coefficients had been established. Two kinds of curve functions had been used to simulate, i.e. S curve at blue waveband and inverse function at green and red wavebands. And the change ranges of MAPE and RMSE are 0.027-0.156 m^-1 and 0.005-0.050m^-1, which indicated higher accuracy. Meanwhile, marked spatial distribution differences of the backscattering and scattering coefficients were found in Lake Taihu. As far as the entire lake was concerned, the scattering and backscattering coefficients in wester lake regions were higher than those in eastern lake regions. Strong scattering and backscattering were found in Meiliang Bay, center region of lake, western and southwestern lake region, while weak values were in East Lake Taihu and Xukou Bay.