We revisit the dependence of covering factor (CF) of dust torus on physical properties of AGNs by taking into account an AGN polar dust emission. The CF is converted from a ratio of IR luminosity contributed from AGN dust torus (LIR_torus) and AGN bolometric luminosity (L_bol), by assuming a non-linear relation between luminosity ratio and intrinsic CF. We select 37,181 type 1 quasars at z < 0.7 from the SDSS DR16 quasar catalog. Their L_bol, black hole mass (M_BH), and Eddington ratio (l_Edd) are derived by spectral fitting with QSFit. We conduct SED decomposition by using X-CIGALE with clumpy torus and polar dust model to estimate LIR_torus without being affected by the contribution of stellar and AGN polar dust to IR emission. For 7842 quasars whose physical quantities are securely determined, we perform a correlation analysis on CF and (i) L_bol, (ii) M_BH, and (iii) l_Edd. As a result, anti-correlations for CF–L_bol, CF–M_BH, and CF–l_Edd are confirmed. We find that incorporating the AGN polar dust emission makes those anti-correlations stronger which are compared to those without considering it. This indicates that polar dust wind provably driven by AGN radiative pressure is one of the key components to regulate obscuring material of AGNs (Toba et al. 2020d, ApJ, submitted).